diff --git a/testdata/array_plus_bad.golden b/testdata/array_plus_bad.golden
new file mode 100644
index 0000000..97c7940
--- /dev/null
+++ b/testdata/array_plus_bad.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type number, expected array
diff --git a/testdata/array_plus_bad.jsonnet b/testdata/array_plus_bad.jsonnet
new file mode 100644
index 0000000..8eb05bc
--- /dev/null
+++ b/testdata/array_plus_bad.jsonnet
@@ -0,0 +1 @@
+[] + 42
diff --git a/testdata/binaryNot2.golden b/testdata/binaryNot2.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/binaryNot2.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/binaryNot2.jsonnet b/testdata/binaryNot2.jsonnet
new file mode 100644
index 0000000..73fc7d6
--- /dev/null
+++ b/testdata/binaryNot2.jsonnet
@@ -0,0 +1 @@
+~"xxx"
diff --git a/testdata/bitwise_or10.golden b/testdata/bitwise_or10.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/bitwise_or10.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/bitwise_or10.jsonnet b/testdata/bitwise_or10.jsonnet
new file mode 100644
index 0000000..ad5d773
--- /dev/null
+++ b/testdata/bitwise_or10.jsonnet
@@ -0,0 +1 @@
+"xxx" | 42
diff --git a/testdata/builtinChar7.golden b/testdata/builtinChar7.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/builtinChar7.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/builtinChar7.jsonnet b/testdata/builtinChar7.jsonnet
new file mode 100644
index 0000000..1cf70d1
--- /dev/null
+++ b/testdata/builtinChar7.jsonnet
@@ -0,0 +1 @@
+std.char("xxx")
diff --git a/testdata/builtinObjectFieldsEx_bad.golden b/testdata/builtinObjectFieldsEx_bad.golden
new file mode 100644
index 0000000..23ae9e6
--- /dev/null
+++ b/testdata/builtinObjectFieldsEx_bad.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type number, expected object
diff --git a/testdata/builtinObjectFieldsEx_bad.jsonnet b/testdata/builtinObjectFieldsEx_bad.jsonnet
new file mode 100644
index 0000000..9243cec
--- /dev/null
+++ b/testdata/builtinObjectFieldsEx_bad.jsonnet
@@ -0,0 +1 @@
+std.objectFieldsEx(42, true)
diff --git a/testdata/builtinObjectFieldsEx_bad2.golden b/testdata/builtinObjectFieldsEx_bad2.golden
new file mode 100644
index 0000000..66a0ec2
--- /dev/null
+++ b/testdata/builtinObjectFieldsEx_bad2.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected boolean
diff --git a/testdata/builtinObjectFieldsEx_bad2.jsonnet b/testdata/builtinObjectFieldsEx_bad2.jsonnet
new file mode 100644
index 0000000..3470049
--- /dev/null
+++ b/testdata/builtinObjectFieldsEx_bad2.jsonnet
@@ -0,0 +1 @@
+std.objectFieldsEx({}, "xxx")
diff --git a/testdata/builtinObjectHasExBadBoolean.golden b/testdata/builtinObjectHasExBadBoolean.golden
new file mode 100644
index 0000000..66a0ec2
--- /dev/null
+++ b/testdata/builtinObjectHasExBadBoolean.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected boolean
diff --git a/testdata/builtinObjectHasExBadBoolean.jsonnet b/testdata/builtinObjectHasExBadBoolean.jsonnet
new file mode 100644
index 0000000..ffbbfed
--- /dev/null
+++ b/testdata/builtinObjectHasExBadBoolean.jsonnet
@@ -0,0 +1 @@
+std.objectHasEx({}, "xxx", "xxx")
diff --git a/testdata/builtin_sqrt2.golden b/testdata/builtin_sqrt2.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/builtin_sqrt2.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/builtin_sqrt2.jsonnet b/testdata/builtin_sqrt2.jsonnet
new file mode 100644
index 0000000..15da519
--- /dev/null
+++ b/testdata/builtin_sqrt2.jsonnet
@@ -0,0 +1 @@
+std.sqrt("cookie")
diff --git a/testdata/extvar_not_a_string.golden b/testdata/extvar_not_a_string.golden
new file mode 100644
index 0000000..f94e054
--- /dev/null
+++ b/testdata/extvar_not_a_string.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type number, expected string
diff --git a/testdata/extvar_not_a_string.jsonnet b/testdata/extvar_not_a_string.jsonnet
new file mode 100644
index 0000000..19130d5
--- /dev/null
+++ b/testdata/extvar_not_a_string.jsonnet
@@ -0,0 +1 @@
+std.extVar(42)
diff --git a/testdata/function_plus_bad.golden b/testdata/function_plus_bad.golden
new file mode 100644
index 0000000..825d319
--- /dev/null
+++ b/testdata/function_plus_bad.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type function
diff --git a/testdata/function_plus_bad.jsonnet b/testdata/function_plus_bad.jsonnet
new file mode 100644
index 0000000..007700b
--- /dev/null
+++ b/testdata/function_plus_bad.jsonnet
@@ -0,0 +1 @@
+(function() 42) +  42
diff --git a/testdata/function_plus_string.golden b/testdata/function_plus_string.golden
new file mode 100644
index 0000000..e793b6e
--- /dev/null
+++ b/testdata/function_plus_string.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Couldn't manifest function in JSON output.
diff --git a/testdata/function_plus_string.jsonnet b/testdata/function_plus_string.jsonnet
new file mode 100644
index 0000000..bc72d81
--- /dev/null
+++ b/testdata/function_plus_string.jsonnet
@@ -0,0 +1 @@
+(function() 42) + "xxx"
diff --git a/testdata/number_divided_by_string.golden b/testdata/number_divided_by_string.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/number_divided_by_string.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/number_divided_by_string.jsonnet b/testdata/number_divided_by_string.jsonnet
new file mode 100644
index 0000000..de8cab5
--- /dev/null
+++ b/testdata/number_divided_by_string.jsonnet
@@ -0,0 +1 @@
+42 / "xxx"
diff --git a/testdata/number_times_string.golden b/testdata/number_times_string.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/number_times_string.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/number_times_string.jsonnet b/testdata/number_times_string.jsonnet
new file mode 100644
index 0000000..4f33910
--- /dev/null
+++ b/testdata/number_times_string.jsonnet
@@ -0,0 +1 @@
+42 * "xxx"
diff --git a/testdata/object_plus_bad.golden b/testdata/object_plus_bad.golden
new file mode 100644
index 0000000..23ae9e6
--- /dev/null
+++ b/testdata/object_plus_bad.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type number, expected object
diff --git a/testdata/object_plus_bad.jsonnet b/testdata/object_plus_bad.jsonnet
new file mode 100644
index 0000000..eb5f316
--- /dev/null
+++ b/testdata/object_plus_bad.jsonnet
@@ -0,0 +1 @@
+{} + 42
diff --git a/testdata/pow8.golden b/testdata/pow8.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/pow8.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/pow8.jsonnet b/testdata/pow8.jsonnet
new file mode 100644
index 0000000..a41595a
--- /dev/null
+++ b/testdata/pow8.jsonnet
@@ -0,0 +1 @@
+std.pow("xxx", 42)
diff --git a/testdata/pow9.golden b/testdata/pow9.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/pow9.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/pow9.jsonnet b/testdata/pow9.jsonnet
new file mode 100644
index 0000000..d6ac635
--- /dev/null
+++ b/testdata/pow9.jsonnet
@@ -0,0 +1 @@
+std.pow(42, "xxx")
diff --git a/testdata/std.codepoint8.golden b/testdata/std.codepoint8.golden
new file mode 100644
index 0000000..f94e054
--- /dev/null
+++ b/testdata/std.codepoint8.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type number, expected string
diff --git a/testdata/std.codepoint8.jsonnet b/testdata/std.codepoint8.jsonnet
new file mode 100644
index 0000000..37c614d
--- /dev/null
+++ b/testdata/std.codepoint8.jsonnet
@@ -0,0 +1 @@
+std.codepoint(42)
diff --git a/testdata/std.filter8.golden b/testdata/std.filter8.golden
new file mode 100644
index 0000000..96515b3
--- /dev/null
+++ b/testdata/std.filter8.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type function, expected array
diff --git a/testdata/std.filter8.jsonnet b/testdata/std.filter8.jsonnet
new file mode 100644
index 0000000..359a7b7
--- /dev/null
+++ b/testdata/std.filter8.jsonnet
@@ -0,0 +1 @@
+std.filter([42], function(i) "xxx")
diff --git a/testdata/std.makeArray_bad.golden b/testdata/std.makeArray_bad.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/std.makeArray_bad.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/std.makeArray_bad.jsonnet b/testdata/std.makeArray_bad.jsonnet
new file mode 100644
index 0000000..cae3e62
--- /dev/null
+++ b/testdata/std.makeArray_bad.jsonnet
@@ -0,0 +1 @@
+std.makeArray("xxx", function(i) i)
diff --git a/testdata/std.makeArray_bad2.golden b/testdata/std.makeArray_bad2.golden
new file mode 100644
index 0000000..b1176fb
--- /dev/null
+++ b/testdata/std.makeArray_bad2.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected function
diff --git a/testdata/std.makeArray_bad2.jsonnet b/testdata/std.makeArray_bad2.jsonnet
new file mode 100644
index 0000000..ad9fcdf
--- /dev/null
+++ b/testdata/std.makeArray_bad2.jsonnet
@@ -0,0 +1 @@
+std.makeArray(42, "xxx")
diff --git a/testdata/std.modulo.golden b/testdata/std.modulo.golden
new file mode 100644
index 0000000..0cfbf08
--- /dev/null
+++ b/testdata/std.modulo.golden
@@ -0,0 +1 @@
+2
diff --git a/testdata/std.modulo.jsonnet b/testdata/std.modulo.jsonnet
new file mode 100644
index 0000000..3b8c4d9
--- /dev/null
+++ b/testdata/std.modulo.jsonnet
@@ -0,0 +1 @@
+std.modulo(42, 5)
diff --git a/testdata/std.modulo2.golden b/testdata/std.modulo2.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/std.modulo2.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/std.modulo2.jsonnet b/testdata/std.modulo2.jsonnet
new file mode 100644
index 0000000..cb21571
--- /dev/null
+++ b/testdata/std.modulo2.jsonnet
@@ -0,0 +1 @@
+std.modulo("xxx", 42)
diff --git a/testdata/std.modulo3.golden b/testdata/std.modulo3.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/std.modulo3.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/std.modulo3.jsonnet b/testdata/std.modulo3.jsonnet
new file mode 100644
index 0000000..cb21571
--- /dev/null
+++ b/testdata/std.modulo3.jsonnet
@@ -0,0 +1 @@
+std.modulo("xxx", 42)
diff --git a/testdata/std.primitiveEquals19.golden b/testdata/std.primitiveEquals19.golden
new file mode 100644
index 0000000..27ba77d
--- /dev/null
+++ b/testdata/std.primitiveEquals19.golden
@@ -0,0 +1 @@
+true
diff --git a/testdata/std.primitiveEquals19.jsonnet b/testdata/std.primitiveEquals19.jsonnet
new file mode 100644
index 0000000..2e38df9
--- /dev/null
+++ b/testdata/std.primitiveEquals19.jsonnet
@@ -0,0 +1 @@
+std.primitiveEquals(true, true)
diff --git a/testdata/std.primitiveEquals20.golden b/testdata/std.primitiveEquals20.golden
new file mode 100644
index 0000000..c508d53
--- /dev/null
+++ b/testdata/std.primitiveEquals20.golden
@@ -0,0 +1 @@
+false
diff --git a/testdata/std.primitiveEquals20.jsonnet b/testdata/std.primitiveEquals20.jsonnet
new file mode 100644
index 0000000..49ec501
--- /dev/null
+++ b/testdata/std.primitiveEquals20.jsonnet
@@ -0,0 +1 @@
+std.primitiveEquals(true, "xxx")
diff --git a/testdata/std.primitiveEquals21.golden b/testdata/std.primitiveEquals21.golden
new file mode 100644
index 0000000..c508d53
--- /dev/null
+++ b/testdata/std.primitiveEquals21.golden
@@ -0,0 +1 @@
+false
diff --git a/testdata/std.primitiveEquals21.jsonnet b/testdata/std.primitiveEquals21.jsonnet
new file mode 100644
index 0000000..bb1caa9
--- /dev/null
+++ b/testdata/std.primitiveEquals21.jsonnet
@@ -0,0 +1 @@
+std.primitiveEquals("xxx", 42)
diff --git a/testdata/string_divided_by_number.golden b/testdata/string_divided_by_number.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/string_divided_by_number.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/string_divided_by_number.jsonnet b/testdata/string_divided_by_number.jsonnet
new file mode 100644
index 0000000..c624a6b
--- /dev/null
+++ b/testdata/string_divided_by_number.jsonnet
@@ -0,0 +1 @@
+"xxx" / 42
diff --git a/testdata/string_minus_number.golden b/testdata/string_minus_number.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/string_minus_number.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/string_minus_number.jsonnet b/testdata/string_minus_number.jsonnet
new file mode 100644
index 0000000..eb1ee42
--- /dev/null
+++ b/testdata/string_minus_number.jsonnet
@@ -0,0 +1 @@
+"x" - 42
diff --git a/testdata/string_plus_function.golden b/testdata/string_plus_function.golden
new file mode 100644
index 0000000..e793b6e
--- /dev/null
+++ b/testdata/string_plus_function.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Couldn't manifest function in JSON output.
diff --git a/testdata/string_plus_function.jsonnet b/testdata/string_plus_function.jsonnet
new file mode 100644
index 0000000..38d4267
--- /dev/null
+++ b/testdata/string_plus_function.jsonnet
@@ -0,0 +1 @@
+"xxx" + (function() 42)
diff --git a/testdata/string_times_number.golden b/testdata/string_times_number.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/string_times_number.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/string_times_number.jsonnet b/testdata/string_times_number.jsonnet
new file mode 100644
index 0000000..3a5f7e7
--- /dev/null
+++ b/testdata/string_times_number.jsonnet
@@ -0,0 +1 @@
+"x" * 42
diff --git a/testdata/unary_minus.golden b/testdata/unary_minus.golden
new file mode 100644
index 0000000..6a0e60d
--- /dev/null
+++ b/testdata/unary_minus.golden
@@ -0,0 +1 @@
+-42
diff --git a/testdata/unary_minus.jsonnet b/testdata/unary_minus.jsonnet
new file mode 100644
index 0000000..6a0e60d
--- /dev/null
+++ b/testdata/unary_minus.jsonnet
@@ -0,0 +1 @@
+-42
diff --git a/testdata/unary_minus2.golden b/testdata/unary_minus2.golden
new file mode 100644
index 0000000..d81cc07
--- /dev/null
+++ b/testdata/unary_minus2.golden
@@ -0,0 +1 @@
+42
diff --git a/testdata/unary_minus2.jsonnet b/testdata/unary_minus2.jsonnet
new file mode 100644
index 0000000..ef0d12a
--- /dev/null
+++ b/testdata/unary_minus2.jsonnet
@@ -0,0 +1 @@
+-(-42)
diff --git a/testdata/unary_minus3.golden b/testdata/unary_minus3.golden
new file mode 100644
index 0000000..6a0e60d
--- /dev/null
+++ b/testdata/unary_minus3.golden
@@ -0,0 +1 @@
+-42
diff --git a/testdata/unary_minus3.jsonnet b/testdata/unary_minus3.jsonnet
new file mode 100644
index 0000000..9181679
--- /dev/null
+++ b/testdata/unary_minus3.jsonnet
@@ -0,0 +1 @@
+-(42)
diff --git a/testdata/unary_minus4.golden b/testdata/unary_minus4.golden
new file mode 100644
index 0000000..b1ad9cf
--- /dev/null
+++ b/testdata/unary_minus4.golden
@@ -0,0 +1 @@
+RUNTIME ERROR: Unexpected type string, expected number
diff --git a/testdata/unary_minus4.jsonnet b/testdata/unary_minus4.jsonnet
new file mode 100644
index 0000000..bddd2c0
--- /dev/null
+++ b/testdata/unary_minus4.jsonnet
@@ -0,0 +1 @@
+-"xxx"