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Expand equality failure messages with a by-line diff.

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This commit is contained in:
kosak
2014-07-28 21:54:50 +00:00
parent bd263344f9
commit b54098a9ab
5 changed files with 433 additions and 5 deletions
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94
test/gtest_unittest.cc
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@@ -282,6 +282,9 @@ using testing::internal::TestEventListenersAccessor;
using testing::internal::TestResultAccessor;
using testing::internal::UInt32;
using testing::internal::WideStringToUtf8;
using testing::internal::edit_distance::CalculateOptimalEdits;
using testing::internal::edit_distance::CreateUnifiedDiff;
using testing::internal::edit_distance::EditType;
using testing::internal::kMaxRandomSeed;
using testing::internal::kTestTypeIdInGoogleTest;
using testing::internal::scoped_ptr;
@@ -3431,6 +3434,79 @@ TEST_F(NoFatalFailureTest, MessageIsStreamable) {
// Tests non-string assertions.
std::string EditsToString(const std::vector<EditType>& edits) {
std::string out;
for (size_t i = 0; i < edits.size(); ++i) {
static const char kEdits[] = " +-/";
out.append(1, kEdits[edits[i]]);
}
return out;
}
std::vector<size_t> CharsToIndices(const std::string& str) {
std::vector<size_t> out;
for (size_t i = 0; i < str.size(); ++i) {
out.push_back(str[i]);
}
return out;
}
std::vector<std::string> CharsToLines(const std::string& str) {
std::vector<std::string> out;
for (size_t i = 0; i < str.size(); ++i) {
out.push_back(str.substr(i, 1));
}
return out;
}
TEST(EditDistance, TestCases) {
struct Case {
int line;
const char* left;
const char* right;
const char* expected_edits;
const char* expected_diff;
};
static const Case kCases[] = {
// No change.
{__LINE__, "A", "A", " ", ""},
{__LINE__, "ABCDE", "ABCDE", " ", ""},
// Simple adds.
{__LINE__, "X", "XA", " +", "@@ +1,2 @@\n X\n+A\n"},
{__LINE__, "X", "XABCD", " ++++", "@@ +1,5 @@\n X\n+A\n+B\n+C\n+D\n"},
// Simple removes.
{__LINE__, "XA", "X", " -", "@@ -1,2 @@\n X\n-A\n"},
{__LINE__, "XABCD", "X", " ----", "@@ -1,5 @@\n X\n-A\n-B\n-C\n-D\n"},
// Simple replaces.
{__LINE__, "A", "a", "/", "@@ -1,1 +1,1 @@\n-A\n+a\n"},
{__LINE__, "ABCD", "abcd", "////",
"@@ -1,4 +1,4 @@\n-A\n-B\n-C\n-D\n+a\n+b\n+c\n+d\n"},
// Path finding.
{__LINE__, "ABCDEFGH", "ABXEGH1", " -/ - +",
"@@ -1,8 +1,7 @@\n A\n B\n-C\n-D\n+X\n E\n-F\n G\n H\n+1\n"},
{__LINE__, "AAAABCCCC", "ABABCDCDC", "- / + / ",
"@@ -1,9 +1,9 @@\n-A\n A\n-A\n+B\n A\n B\n C\n+D\n C\n-C\n+D\n C\n"},
{__LINE__, "ABCDE", "BCDCD", "- +/",
"@@ -1,5 +1,5 @@\n-A\n B\n C\n D\n-E\n+C\n+D\n"},
{__LINE__, "ABCDEFGHIJKL", "BCDCDEFGJKLJK", "- ++ -- ++",
"@@ -1,4 +1,5 @@\n-A\n B\n+C\n+D\n C\n D\n"
"@@ -6,7 +7,7 @@\n F\n G\n-H\n-I\n J\n K\n L\n+J\n+K\n"},
{}};
for (const Case* c = kCases; c->left; ++c) {
EXPECT_TRUE(c->expected_edits ==
EditsToString(CalculateOptimalEdits(CharsToIndices(c->left),
CharsToIndices(c->right))))
<< "Left <" << c->left << "> Right <" << c->right << "> Edits <"
<< EditsToString(CalculateOptimalEdits(
CharsToIndices(c->left), CharsToIndices(c->right))) << ">";
EXPECT_TRUE(c->expected_diff == CreateUnifiedDiff(CharsToLines(c->left),
CharsToLines(c->right)))
<< "Left <" << c->left << "> Right <" << c->right << "> Diff <"
<< CreateUnifiedDiff(CharsToLines(c->left), CharsToLines(c->right))
<< ">";
}
}
// Tests EqFailure(), used for implementing *EQ* assertions.
TEST(AssertionTest, EqFailure) {
const std::string foo_val("5"), bar_val("6");
@@ -3481,6 +3557,24 @@ TEST(AssertionTest, EqFailure) {
msg5.c_str());
}
TEST(AssertionTest, EqFailureWithDiff) {
const std::string left(
"1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15");
const std::string right(
"1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14");
const std::string msg1(
EqFailure("left", "right", left, right, false).failure_message());
EXPECT_STREQ(
"Value of: right\n"
" Actual: 1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14\n"
"Expected: left\n"
"Which is: "
"1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15\n"
"With diff:\n@@ -1,5 +1,6 @@\n 1\n-2XXX\n+2\n 3\n+4\n 5\n 6\n"
"@@ -7,8 +8,6 @@\n 8\n 9\n-10\n 11\n-12XXX\n+12\n 13\n 14\n-15\n",
msg1.c_str());
}
// Tests AppendUserMessage(), used for implementing the *EQ* macros.
TEST(AssertionTest, AppendUserMessage) {
const std::string foo("foo");