Add tests for auto-generated constants

generate_constants.py

@@ -154,3 +154,67 @@ with open("constants.go", 'w') as f:
                               lastValue=lastValue,
                               constNames=constNames,
                               upperValueString=upperValueString))
+
+test_header = """package ofxgo_test
+
+/*
+ * Do not edit this file by hand. It is auto-generated by calling `go generate`.
+ * To make changes, edit generate_constants.py, re-run `go generate`, and check
+ * in the result.
+ */
+
+import (
+	"github.com/aclindsa/go/src/encoding/xml"
+	"github.com/aclindsa/ofxgo"
+	"testing"
+)
+"""
+
+test_template = """
+func Test{enum}(t *testing.T) {{
+	e, err := ofxgo.New{enum}("{firstValueUpper}")
+	if err != nil {{
+		t.Fatalf("Unexpected error creating new {enum} from string \\\"{firstValueUpper}\\\"\\n")
+	}}
+	if !e.Valid() {{
+		t.Fatalf("{enum} unexpectedly invalid\\n")
+	}}
+	err = e.FromString("{lastValueUpper}")
+	if err != nil {{
+		t.Fatalf("Unexpected error on {enum}.FromString(\\\"{lastValueUpper}\\\")\\n")
+	}}
+	if e.String() != "{lastValueUpper}" {{
+		t.Fatalf("{enum}.String() expected to be \\\"{lastValueUpper}\\\"\\n")
+	}}
+
+	marshalHelper(t, "{lastValueUpper}", &e)
+
+	overwritten, err := ofxgo.New{enum}("THISWILLNEVERBEAVALIDENUMSTRING")
+	if err == nil {{
+		t.Fatalf("Expected error creating new {enum} from string \\\"THISWILLNEVERBEAVALIDENUMSTRING\\\"\\n")
+	}}
+	if overwritten.Valid() {{
+		t.Fatalf("{enum} created with string \\\"THISWILLNEVERBEAVALIDENUMSTRING\\\" should not be valid\\n")
+	}}
+
+	b, err := xml.Marshal(&overwritten)
+	if err != nil {{
+		t.Fatalf("Unexpected error on xml.Marshal({enum}): %s\\n", err)
+	}}
+	if string(b) != "" {{
+		t.Fatalf("Expected empty string, got '%s'\\n", string(b))
+	}}
+
+	unmarshalHelper(t, "{lastValueUpper}", &e, &overwritten)
+}}
+"""
+
+with open("constants_test.go", 'w') as f:
+    f.write(test_header)
+
+    for enum in enums:
+        firstValueUpper = enums[enum][0].upper()
+        lastValueUpper = enums[enum][-1].upper()
+        f.write(test_template.format(enum=enum,
+                              firstValueUpper=firstValueUpper,
+                              lastValueUpper=lastValueUpper))