Tests: padded and stray-brace arguments, the inline held fence, a template under concurrent use, and the fieldless-token hint

cmd/fejkdata/main_test.go

@@ -309,6 +309,7 @@ func TestClassify(t *testing.T) {
 		`{"format":"x"}`: argTemplate,
 		`["a","b"]`:      argTemplate, // a JSON array carries no brace
 		`[1, 2]`:         argTemplate,
+		` ["a","b"]`:     argTemplate, // padding is the template's own error, not a shape verdict
 		`"hello"`:        argTemplate, // a JSON string, the spelling a format-only object names
 	} {
 		got, err := classify(arg)
@@ -321,6 +322,7 @@ func TestClassify(t *testing.T) {
 		"[abc].field": `holds a "["`,
 		"x[1]":        `holds a "["`,
 		"a]b":         `holds a "]"`,
+		"a}b":         `holds a "}"`,
 		`"abc`:        `holds a "\""`,
 		`"a]b`:        `holds a "\""`, // the opener the reader typed, not the bracket behind it
 	} {
@@ -358,16 +360,17 @@ func TestRunInlineTemplate(t *testing.T) {
 }
 
 func TestRunTemplateMisuse(t *testing.T) {
-	for _, arg := range []string{
-		"{bad",            // unterminated brace
-		"[red,green]",     // a near-miss JSON array (unquoted strings)
-		`{"format":"x"}`,  // an object holding only a format
-		"{/no.such.path}", // a reference into nothing
-		"x[1]",            // a bracket no path may hold
+	for arg, want := range map[string]string{
+		"{bad":            "unterminated",
+		"[red,green]":     "names no template either",
+		`{"format":"x"}`:  "is a string",
+		"{/no.such.path}": "no entry",
+		"x[1]":            "names no template either",
+		` ["a","b"] `:     "may not be padded",
 	} {
 		code, out, errb := runOut("--seed", "1", arg)
-		if code != 2 || out != "" || !strings.Contains(errb, "try 'fejkdata --help'") {
-			t.Errorf("run(%q) = %d, %q, %q; want misuse naming --help", arg, code, out, errb)
+		if code != 2 || out != "" || !strings.Contains(errb, "try 'fejkdata --help'") || !strings.Contains(errb, want) {
+			t.Errorf("run(%q) = %d, %q, %q; want misuse naming %q and --help", arg, code, out, errb, want)
 		}
 		if strings.Contains(errb, "fejkdata: fejkdata:") {
 			t.Errorf("run(%q) doubled the program prefix: %q", arg, errb)

inline_test.go

@@ -76,12 +76,20 @@ func TestFakeTemplateDeterministic(t *testing.T) {
 	}
 }
 
-func TestBareStringReferenceHint(t *testing.T) {
+func TestFieldlessTokenHint(t *testing.T) {
 	f := shipped(t)
 	_, err := f.FakeTemplate(`{sv_SE.person.last}`)
 	if err == nil || !strings.Contains(err.Error(), "write {/sv_SE.person.last}") {
 		t.Fatalf("FakeTemplate(bare token) = %v, want a hint naming {/sv_SE.person.last}", err)
 	}
+	_, err = f.FakeTemplate(`{"format":"{x}","repeat":2}`)
+	if err == nil || strings.Contains(err.Error(), "bare string") {
+		t.Errorf("FakeTemplate(fieldless object) = %v, want an error that does not call it a bare string", err)
+	}
+	_, err = f.FakeTemplate(`{ /sv_SE.person.last }`)
+	if err == nil || strings.Contains(err.Error(), "write {") {
+		t.Errorf("FakeTemplate(malformed token) = %v, want no hint naming a spelling that fails too", err)
+	}
 }
 
 func TestFakeTemplateErrors(t *testing.T) {
@@ -97,6 +105,7 @@ func TestFakeTemplateErrors(t *testing.T) {
 		{`name: {..nope}`, "write {/nope}"},
 		{`{"format":"x"}`, "is a string"},
 		{`{/misc.country} {/misc.country.alpha2}`, "renders a level"},
+		{`{"format":"{/misc.country.alpha2} {x}","x":"{/misc.country}"}`, "renders"},
 	} {
 		_, err := f.FakeTemplate(c.input)
 		if err == nil || !strings.Contains(err.Error(), c.want) {
@@ -124,13 +133,13 @@ func TestPaddedJSONIsRejected(t *testing.T) {
 
 func TestNewTemplateReusable(t *testing.T) {
 	f := shipped(t)
-	tmpl, err := f.NewTemplate(`{digits(2)}`)
+	reusable, err := f.NewTemplate(`{digits(2)}`)
 	if err != nil {
 		t.Fatalf("NewTemplate: %v", err)
 	}
 	seen := map[string]bool{}
 	for i := 0; i < 50; i++ {
-		seen[tmpl.Fake()] = true
+		seen[reusable.Fake()] = true
 	}
 	if len(seen) < 2 {
 		t.Fatalf("Template.Fake() repeated %v, want varied draws from one compile", seen)

shipped_data_test.go

@@ -108,6 +108,12 @@ func TestFakeIsSafeForConcurrentUse(t *testing.T) {
 					return
 				}
 				f.List()
+				tmpl, err := f.NewTemplate("{/sv_SE.person.last}")
+				if err != nil {
+					t.Error(err)
+					return
+				}
+				tmpl.Fake()
 			}
 		}()
 	}