jsonparse: Reword error messages to match encoding/json

8 files changed, 32 insertions, 0 deletions

diff --git a/compat/json/compat_test.go b/compat/json/compat_test.go
index 6aab103..cf9e359 100644
--- a/compat/json/compat_test.go
+++ b/compat/json/compat_test.go
@@ -188,6 +188,24 @@ func TestCompatUnmarshal(t *testing.T) {
 		"obj-overflow":      {In: `{"foo":"bar", "baz":2e308, "qux": "orb"}`, ExpOut: map[string]any{"foo": "bar", "baz": nil, "qux": "orb"}, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type float64`},
 		"ary-overflow":      {In: `["foo",2e308,"bar",3e308]`, ExpOut: []any{"foo", nil, "bar", nil}, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type float64`},
 		"existing-overflow": {In: `2e308`, InPtr: func() any { x := 4; return &x }(), ExpOut: 4, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type int`},
+		// syntax error messages
+		"syntax-01": {In: `{}x`, ExpErr: `invalid character 'x' after top-level value`},
+		"syntax-02": {In: `x`, ExpErr: `invalid character 'x' looking for beginning of value`},
+		"syntax-03": {In: `{x`, ExpErr: `invalid character 'x' looking for beginning of object key string`},
+		"syntax-04": {In: `{""x`, ExpErr: `invalid character 'x' after object key`},
+		"syntax-05": {In: `{"":0x`, ExpErr: `invalid character 'x' after object key:value pair`},
+		"syntax-06": {In: `[0x`, ExpErr: `invalid character 'x' after array element`},
+		"syntax-07": {In: "\"\x01\"", ExpErr: `invalid character '\x01' in string literal`},
+		"syntax-08": {In: `"\x`, ExpErr: `invalid character 'x' in string escape code`},
+		"syntax-09": {In: `"\ux`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
+		"syntax-10": {In: `"\u0x`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
+		"syntax-11": {In: `"\u00x`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
+		"syntax-12": {In: `"\u000x`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
+		"syntax-13": {In: `-x`, ExpErr: `invalid character 'x' in numeric literal`},
+		"syntax-14": {In: `0.x`, ExpErr: `invalid character 'x' after decimal point in numeric literal`},
+		"syntax-15": {In: `1ex`, ExpErr: `invalid character 'x' in exponent of numeric literal`},
+		"syntax-16": {In: `1e+x`, ExpErr: `invalid character 'x' in exponent of numeric literal`},
+		"syntax-17": {In: `fx`, ExpErr: `invalid character 'x' in literal false (expecting 'a')`},
 	}
 	for tcName, tc := range testcases {
 		tc := tc
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/1071d2f6e5b5f7d3 b/compat/json/testdata/fuzz/FuzzEquiv/1071d2f6e5b5f7d3
new file mode 100644
index 0000000..1095817
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/1071d2f6e5b5f7d3
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("0EA")
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/6bced2300496f15c b/compat/json/testdata/fuzz/FuzzEquiv/6bced2300496f15c
new file mode 100644
index 0000000..4bc9c61
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/6bced2300496f15c
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("{0")
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/6daf246742074967 b/compat/json/testdata/fuzz/FuzzEquiv/6daf246742074967
new file mode 100644
index 0000000..b1c3453
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/6daf246742074967
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("\"\\uX")
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/7c3168c77fc059cb b/compat/json/testdata/fuzz/FuzzEquiv/7c3168c77fc059cb
new file mode 100644
index 0000000..b95f079
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/7c3168c77fc059cb
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("\"\x1e")
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/a955c588d78b5c3a b/compat/json/testdata/fuzz/FuzzEquiv/a955c588d78b5c3a
new file mode 100644
index 0000000..b135daa
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/a955c588d78b5c3a
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("0.A")
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/cf667c6f1f3282c1 b/compat/json/testdata/fuzz/FuzzEquiv/cf667c6f1f3282c1
new file mode 100644
index 0000000..f6ab571
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/cf667c6f1f3282c1
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("\"\\0")
diff --git a/compat/json/testdata/fuzz/FuzzEquiv/ef2c8755a89034da b/compat/json/testdata/fuzz/FuzzEquiv/ef2c8755a89034da
new file mode 100644
index 0000000..7d9478d
--- /dev/null
+++ b/compat/json/testdata/fuzz/FuzzEquiv/ef2c8755a89034da
@@ -0,0 +1,2 @@
+go test fuzz v1
+[]byte("0E+A")