171 lines
8.7 KiB
Go
171 lines
8.7 KiB
Go
package fejkdata
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import (
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"encoding/json"
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"regexp"
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"slices"
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"strconv"
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"strings"
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"testing"
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)
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func TestDatatypeAndNullSitOnlyInAColumn(t *testing.T) {
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for _, src := range []string{
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`{"format":"","age":{"format":"{int(18,99)}","datatype":"integer"}}`,
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`{"format":"","n":{"format":"42","datatype":"integer"}}`,
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`{"format":"","gone":null}`,
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`{"format":"","middle":[null,"Ann","Eva"]}`,
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`{"format":"","age":[null,{"format":"{int(18,99)}","datatype":"integer","weight":9}]}`,
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`{"format":"","pick":[[null,"a"],"b"]}`,
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} {
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if _, err := compile(parse(t, src)); err != nil {
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t.Errorf("compile(%s) = %v, want a column to take a datatype and null", src, err)
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}
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}
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for src, want := range map[string]string{
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`{"format":"","n":{"format":"1","datatype":"int"}}`: `datatype takes "integer", "number" or "boolean", got "int"`,
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`{"format":"","n":{"format":"1","datatype":1}}`: "datatype must be a string",
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`{"format":"{int(1,9)}","datatype":"integer"}`: "datatype only types a record column",
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`[{"format":"1","datatype":"integer"},"x"]`: "datatype only types a record column",
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`{"format":"{p}","p":{"format":"{n}","n":{"format":"1","datatype":"integer"}}}`: "datatype only types a record column",
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`{"format":"{n}","repeat":2,"n":{"format":"1","datatype":"integer"}}`: "datatype only types a record column",
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`null`: `so write ""`,
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`{"format":"{p}","p":{"format":"{x}","x":[null,"a"]}}`: `so write ""`,
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`{"format":"","c":[{"format":"1","datatype":"integer"},"x"]}`: `write it as {"format":"x","datatype":"integer"}`,
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`{"format":"","c":[{"format":"1","datatype":"integer"},{"format":"true","datatype":"boolean"}]}`: "a column holds one datatype",
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} {
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if _, err := compile(parse(t, src)); err == nil || !strings.Contains(err.Error(), want) {
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t.Errorf("compile(%s) = %v, want an error containing %q", src, err, want)
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}
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}
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}
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func TestDatatypeRejectsAValueItsTypeRejects(t *testing.T) {
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tree := map[string]string{
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"cat": `[{"format":"{code}","code":"200"},{"format":"{code}","code":"2x"}]`,
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"src": `{"format":"","score":[null,{"format":"{int(1,9)}","datatype":"integer"}]}`,
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}
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for _, c := range []struct{ name, column, want string }{
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{"a sample with leading zeros", `{"format":"{digits(3)}","datatype":"integer"}`, "{digits(3)} prints text, not an integer"},
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{"a fraction", `{"format":"{v}","v":["1","1.5"],"datatype":"integer"}`, `"1.5" is not an integer`},
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{"past int64", `{"format":"9223372036854775808","datatype":"integer"}`, "past the int64 range"},
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{"a float sample", `{"format":"{float(0,1,2)}","datatype":"integer"}`, "{float(0,1,2)} prints a number, not an integer"},
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{"composed digits", `{"format":"1{digits(2)}","datatype":"integer"}`, "is not one value"},
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{"a sign before a sample", `{"format":"-{int(1,9)}","datatype":"integer"}`, "is not one value"},
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{"a repeat", `{"format":"{int(1,9)}","repeat":2,"separator":",","datatype":"integer"}`, "carries a repeat"},
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{"through a reference", `{"format":"{/cat.code}","datatype":"integer"}`, `"2x" is not an integer`},
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{"a null through a reference", `{"format":"{/src.score}","datatype":"integer"}`, "reads a null"},
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{"a bare dot", `{"format":".5","datatype":"number"}`, `".5" is not a number`},
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{"a plus sign", `{"format":"+1","datatype":"number"}`, `"+1" is not a number`},
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{"a text sample", `{"format":"{hex(4)}","datatype":"number"}`, "{hex(4)} prints text, not a number"},
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{"a capital", `{"format":"{b}","b":["true","True"],"datatype":"boolean"}`, `"True" is not a boolean`},
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{"a transform", `{"format":"{lowercase(b)}","b":["TRUE","FALSE"],"datatype":"boolean"}`, "{lowercase(b)} rewrites text"},
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{"a number as a boolean", `{"format":"{int(0,1)}","datatype":"boolean"}`, "{int(0,1)} prints an integer, not a boolean"},
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{"an operand that is not always a number", `{"format":"{calc(a * 2)}","a":["1","x"],"datatype":"number"}`, `operand "a": "x" is not a number`},
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{"a divisor that can be zero", `{"format":"{calc(a / b)}","a":"{int(1,9)}","b":"{int(0,9)}","datatype":"number"}`, "divides by b, which is not proven nonzero"},
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{"an overflow", `{"format":"{calc(a * a)}","a":"{digits(200)}","datatype":"number"}`, "is not proven within 1e300"},
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{"a division in an integer column", `{"format":"{calc(a / b)}","a":"{int(1,9)}","b":"{int(1,9)}","datatype":"integer"}`, "prints a number, not an integer"},
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} {
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row := `{"format":"","col":` + c.column + `}`
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files := map[string]string{"row": row}
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for name, body := range tree {
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files[name] = body
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}
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_, err := New(WithoutShippedData(), WithDataPath(writeData(t, files)))
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if err == nil || !strings.Contains(err.Error(), c.want) {
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t.Errorf("%s: New = %v, want an error containing %q", c.name, err, c.want)
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}
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f := newGenerator(t, writeData(t, tree))
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if _, err := f.NewTemplate(row); err == nil || !strings.Contains(err.Error(), c.want) {
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t.Errorf("%s: NewTemplate = %v, want the inline template refused the same way", c.name, err)
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}
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}
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}
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var jsonInteger = regexp.MustCompile(`^-?(0|[1-9][0-9]*)$`)
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func TestDatatypeAcceptsAColumnThatAlwaysParses(t *testing.T) {
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cat := `[{"format":"{code}","code":"200"},{"format":"{code}","code":"404"}]`
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for _, column := range []string{
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`{"format":"{int(1,99)}","datatype":"integer"}`,
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`{"format":"{int(-9,-1)}","datatype":"integer"}`,
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`{"format":"{seq()}","datatype":"integer"}`,
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`{"format":"{/cat.code}","datatype":"integer"}`,
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`{"format":"{a|b}","a":"1","b":"{int(5,9)}","datatype":"integer"}`,
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`{"format":"{float(-1.5,9.5,0)}","datatype":"integer"}`,
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`{"format":"{float(-1,1,2)}","datatype":"number"}`,
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`{"format":"{v}","v":["1","2.5","6.022e23"],"datatype":"number"}`,
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`{"format":"{b}","b":["true","false"],"datatype":"boolean"}`,
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`{"format":"{calc(net * qty, 2)}","net":["19.99","5.00"],"qty":["3","7"],"datatype":"number"}`,
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`{"format":"{calc(a + b)}","a":"{int(1,9)}","b":"{int(-9,9)}","datatype":"integer"}`,
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`{"format":"{calc(x / (b - c), 2)}","x":"{int(1,9)}","b":"{int(10,20)}","c":"{int(1,5)}","datatype":"number"}`,
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`{"format":"{calc(x * x * x * x, 2)}","x":"{float(0,1,80)}","datatype":"number"}`,
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`{"format":"{calc(a / (b + 1), 2)}","a":"{int(1,9)}","b":"{digits(2)}","datatype":"number"}`,
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`{"format":"{calc(a / b, 0)}","a":"{int(1,9)}","b":"{int(1,9)}","datatype":"integer"}`,
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`{"format":"{calc(sub * 1.25, 2)}","sub":{"format":"{calc(a * b)}","a":"{int(1,9)}","b":"{float(0,5,2)}"},"datatype":"number"}`,
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} {
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row := `{"format":"","col":` + column + `}`
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f, err := New(WithoutShippedData(), WithDataPath(writeData(t, map[string]string{"cat": cat, "row": row})), WithSeed(1))
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if err != nil {
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t.Errorf("%s: New = %v, want it loaded", column, err)
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continue
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}
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for i := 0; i < 200; i++ {
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r, err := f.FakeRecord("row")
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if err != nil {
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t.Fatal(err)
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}
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var m map[string]any
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if err := json.Unmarshal([]byte(r.JSON()), &m); err != nil {
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t.Errorf("%s: JSON() = %s is not JSON: %v", column, r.JSON(), err)
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break
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}
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c := r.Columns()[0]
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_, isBool := m["col"].(bool)
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_, isNumber := m["col"].(float64)
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_, int64Err := strconv.ParseInt(c.Value, 10, 64)
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if c.DataType == DataTypeBoolean && !isBool || c.DataType != DataTypeBoolean && !isNumber || c.DataType == DataTypeInteger && (!jsonInteger.MatchString(c.Value) || int64Err != nil) {
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t.Errorf("%s: column %+v written as %s, want its datatype", column, c, r.JSON())
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break
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}
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}
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}
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}
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func TestNullColumn(t *testing.T) {
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dir := writeData(t, map[string]string{
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"row": `{"format":"[{middle}]","gone":null,"middle":[null,"Ann"],"score":[null,{"format":"{int(1,9)}","datatype":"integer"}]}`,
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})
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f := newGenerator(t, dir, WithSeed(1))
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drew := map[bool]bool{}
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for i := 0; i < 100; i++ {
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r, err := f.FakeRecord("row")
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if err != nil {
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t.Fatal(err)
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}
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gone, middle, score := r.Columns()[0], r.Columns()[1], r.Columns()[2]
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if !gone.Null || gone.Value != "" || gone.DataType != DataTypeString {
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t.Fatalf("gone = %+v, want a null string column every draw", gone)
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}
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if middle.Null == (middle.Value == "Ann") {
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t.Fatalf("middle = %+v, want null or Ann", middle)
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}
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if score.DataType != DataTypeInteger {
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t.Fatalf("score = %+v, want the integer its non-null item declares, null or not", score)
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}
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drew[middle.Null] = true
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}
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if len(drew) != 2 {
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t.Errorf("middle drew only null=%v in 100 records, want both", drew)
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}
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if v := fake(t, f, "row"); v != "[]" && v != "[Ann]" {
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t.Errorf("Fake(row) = %q, want a null to render as \"\"", v)
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}
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if v := fake(t, f, "row.gone"); v != "" {
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t.Errorf("Fake(row.gone) = %q, want \"\"", v)
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}
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if !slices.Contains(f.List(), "row.gone") {
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t.Errorf("List() = %v, want the null column row.gone, which Fake accepts", f.List())
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}
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}
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