moved everything into pkg/

pkg/crypto/ec/ecdsa/error_test.go

@@ -0,0 +1,146 @@
+// Copyright (c) 2020-2022 The Decred developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package ecdsa
+
+import (
+	"errors"
+	"testing"
+)
+
+// TestErrorKindStringer tests the stringized output for the ErrorKind type.
+func TestErrorKindStringer(t *testing.T) {
+	tests := []struct {
+		in   ErrorKind
+		want string
+	}{
+		{ErrSigTooShort, "ErrSigTooShort"},
+		{ErrSigTooLong, "ErrSigTooLong"},
+		{ErrSigInvalidSeqID, "ErrSigInvalidSeqID"},
+		{ErrSigInvalidDataLen, "ErrSigInvalidDataLen"},
+		{ErrSigMissingSTypeID, "ErrSigMissingSTypeID"},
+		{ErrSigMissingSLen, "ErrSigMissingSLen"},
+		{ErrSigInvalidSLen, "ErrSigInvalidSLen"},
+		{ErrSigInvalidRIntID, "ErrSigInvalidRIntID"},
+		{ErrSigZeroRLen, "ErrSigZeroRLen"},
+		{ErrSigNegativeR, "ErrSigNegativeR"},
+		{ErrSigTooMuchRPadding, "ErrSigTooMuchRPadding"},
+		{ErrSigRIsZero, "ErrSigRIsZero"},
+		{ErrSigRTooBig, "ErrSigRTooBig"},
+		{ErrSigInvalidSIntID, "ErrSigInvalidSIntID"},
+		{ErrSigZeroSLen, "ErrSigZeroSLen"},
+		{ErrSigNegativeS, "ErrSigNegativeS"},
+		{ErrSigTooMuchSPadding, "ErrSigTooMuchSPadding"},
+		{ErrSigSIsZero, "ErrSigSIsZero"},
+		{ErrSigSTooBig, "ErrSigSTooBig"},
+		{ErrSigInvalidLen, "ErrSigInvalidLen"},
+		{ErrSigInvalidRecoveryCode, "ErrSigInvalidRecoveryCode"},
+		{ErrSigOverflowsPrime, "ErrSigOverflowsPrime"},
+		{ErrPointNotOnCurve, "ErrPointNotOnCurve"},
+	}
+
+	for i, test := range tests {
+		result := test.in.Error()
+		if result != test.want {
+			t.Errorf("#%d: got: %s want: %s", i, result, test.want)
+			continue
+		}
+	}
+}
+
+// TestError tests the error output for the Error type.
+func TestError(t *testing.T) {
+	tests := []struct {
+		in   Error
+		want string
+	}{{
+		Error{Description: "some error"},
+		"some error",
+	}, {
+		Error{Description: "human-readable error"},
+		"human-readable error",
+	}}
+	for i, test := range tests {
+		result := test.in.Error()
+		if result != test.want {
+			t.Errorf("#%d: got: %s want: %s", i, result, test.want)
+			continue
+		}
+	}
+}
+
+// TestErrorKindIsAs ensures both ErrorKind and Error can be identified as being
+// a specific error kind via errors.Is and unwrapped via errors.As.
+func TestErrorKindIsAs(t *testing.T) {
+	tests := []struct {
+		name      string
+		err       error
+		target    error
+		wantMatch bool
+		wantAs    ErrorKind
+	}{{
+		name:      "ErrSigTooShort == ErrSigTooShort",
+		err:       ErrSigTooShort,
+		target:    ErrSigTooShort,
+		wantMatch: true,
+		wantAs:    ErrSigTooShort,
+	}, {
+		name:      "Error.ErrSigTooShort == ErrSigTooShort",
+		err:       signatureError(ErrSigTooShort, ""),
+		target:    ErrSigTooShort,
+		wantMatch: true,
+		wantAs:    ErrSigTooShort,
+	}, {
+		name:      "Error.ErrSigTooShort == Error.ErrSigTooShort",
+		err:       signatureError(ErrSigTooShort, ""),
+		target:    signatureError(ErrSigTooShort, ""),
+		wantMatch: true,
+		wantAs:    ErrSigTooShort,
+	}, {
+		name:      "ErrSigTooLong != ErrSigTooShort",
+		err:       ErrSigTooLong,
+		target:    ErrSigTooShort,
+		wantMatch: false,
+		wantAs:    ErrSigTooLong,
+	}, {
+		name:      "Error.ErrSigTooLong != ErrSigTooShort",
+		err:       signatureError(ErrSigTooLong, ""),
+		target:    ErrSigTooShort,
+		wantMatch: false,
+		wantAs:    ErrSigTooLong,
+	}, {
+		name:      "ErrSigTooLong != Error.ErrSigTooShort",
+		err:       ErrSigTooLong,
+		target:    signatureError(ErrSigTooShort, ""),
+		wantMatch: false,
+		wantAs:    ErrSigTooLong,
+	}, {
+		name:      "Error.ErrSigTooLong != Error.ErrSigTooShort",
+		err:       signatureError(ErrSigTooLong, ""),
+		target:    signatureError(ErrSigTooShort, ""),
+		wantMatch: false,
+		wantAs:    ErrSigTooLong,
+	}}
+	for _, test := range tests {
+		// Ensure the error matches or not depending on the expected result.
+		result := errors.Is(test.err, test.target)
+		if result != test.wantMatch {
+			t.Errorf("%s: incorrect error identification -- got %v, want %v",
+				test.name, result, test.wantMatch)
+			continue
+		}
+		// Ensure the underlying error kind can be unwrapped and is the
+		// expected code.
+		var kind ErrorKind
+		if !errors.As(test.err, &kind) {
+			t.Errorf("%s: unable to unwrap to error", test.name)
+			continue
+		}
+		if !errors.Is(kind, test.wantAs) {
+			t.Errorf("%s: unexpected unwrapped error -- got %v, want %v",
+				test.name, kind, test.wantAs)
+			continue
+		}
+	}
+}