1 files changed, 133 insertions, 0 deletions
diff --git a/absl/strings/internal/str_format/bind_test.cc b/absl/strings/internal/str_format/bind_test.cc
new file mode 100644
index 00000000..58d9e072
--- /dev/null
+++ b/absl/strings/internal/str_format/bind_test.cc
@@ -0,0 +1,133 @@
+#include "absl/strings/internal/str_format/bind.h"
+
+#include <string.h>
+
+#include "gtest/gtest.h"
+
+namespace absl {
+inline namespace lts_2018_12_18 {
+namespace str_format_internal {
+namespace {
+
+template <typename T, size_t N>
+size_t ArraySize(T (&)[N]) {
+  return N;
+}
+
+class FormatBindTest : public ::testing::Test {
+ public:
+  bool Extract(const char *s, UnboundConversion *props, int *next) const {
+    absl::string_view src = s;
+    return ConsumeUnboundConversion(&src, props, next) && src.empty();
+  }
+};
+
+TEST_F(FormatBindTest, BindSingle) {
+  struct Expectation {
+    int line;
+    const char *fmt;
+    int ok_phases;
+    const FormatArgImpl *arg;
+    int width;
+    int precision;
+    int next_arg;
+  };
+  const int no = -1;
+  const int ia[] = { 10, 20, 30, 40};
+  const FormatArgImpl args[] = {FormatArgImpl(ia[0]), FormatArgImpl(ia[1]),
+                                FormatArgImpl(ia[2]), FormatArgImpl(ia[3])};
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+  const Expectation kExpect[] = {
+    {__LINE__, "d",          2, &args[0], no, no, 2},
+    {__LINE__, "4d",         2, &args[0],  4, no, 2},
+    {__LINE__, ".5d",        2, &args[0], no,  5, 2},
+    {__LINE__, "4.5d",       2, &args[0],  4,  5, 2},
+    {__LINE__, "*d",         2, &args[1], 10, no, 3},
+    {__LINE__, ".*d",        2, &args[1], no, 10, 3},
+    {__LINE__, "*.*d",       2, &args[2], 10, 20, 4},
+    {__LINE__, "1$d",        2, &args[0], no, no, 0},
+    {__LINE__, "2$d",        2, &args[1], no, no, 0},
+    {__LINE__, "3$d",        2, &args[2], no, no, 0},
+    {__LINE__, "4$d",        2, &args[3], no, no, 0},
+    {__LINE__, "2$*1$d",     2, &args[1], 10, no, 0},
+    {__LINE__, "2$*2$d",     2, &args[1], 20, no, 0},
+    {__LINE__, "2$*3$d",     2, &args[1], 30, no, 0},
+    {__LINE__, "2$.*1$d",    2, &args[1], no, 10, 0},
+    {__LINE__, "2$.*2$d",    2, &args[1], no, 20, 0},
+    {__LINE__, "2$.*3$d",    2, &args[1], no, 30, 0},
+    {__LINE__, "2$*3$.*1$d", 2, &args[1], 30, 10, 0},
+    {__LINE__, "2$*2$.*2$d", 2, &args[1], 20, 20, 0},
+    {__LINE__, "2$*1$.*3$d", 2, &args[1], 10, 30, 0},
+    {__LINE__, "2$*3$.*1$d", 2, &args[1], 30, 10, 0},
+    {__LINE__, "1$*d",       0},  // indexed, then positional
+    {__LINE__, "*2$d",       0},  // positional, then indexed
+    {__LINE__, "6$d",        1},  // arg position out of bounds
+    {__LINE__, "1$6$d",      0},  // width position incorrectly specified
+    {__LINE__, "1$.6$d",     0},  // precision position incorrectly specified
+    {__LINE__, "1$*6$d",     1},  // width position out of bounds
+    {__LINE__, "1$.*6$d",    1},  // precision position out of bounds
+  };
+#pragma GCC diagnostic pop
+  for (const Expectation &e : kExpect) {
+    SCOPED_TRACE(e.line);
+    SCOPED_TRACE(e.fmt);
+    UnboundConversion props;
+    BoundConversion bound;
+    int ok_phases = 0;
+    int next = 0;
+    if (Extract(e.fmt, &props, &next)) {
+      ++ok_phases;
+      if (BindWithPack(&props, args, &bound)) {
+        ++ok_phases;
+      }
+    }
+    EXPECT_EQ(e.ok_phases, ok_phases);
+    if (e.ok_phases < 2) continue;
+    if (e.arg != nullptr) {
+      EXPECT_EQ(e.arg, bound.arg());
+    }
+    EXPECT_EQ(e.width, bound.width());
+    EXPECT_EQ(e.precision, bound.precision());
+  }
+}
+
+TEST_F(FormatBindTest, FormatPack) {
+  struct Expectation {
+    int line;
+    const char *fmt;
+    const char *summary;
+  };
+  const int ia[] = { 10, 20, 30, 40, -10 };
+  const FormatArgImpl args[] = {FormatArgImpl(ia[0]), FormatArgImpl(ia[1]),
+                                FormatArgImpl(ia[2]), FormatArgImpl(ia[3]),
+                                FormatArgImpl(ia[4])};
+  const Expectation kExpect[] = {
+    {__LINE__, "a%4db%dc", "a{10:4d}b{20:d}c"},
+    {__LINE__, "a%.4db%dc", "a{10:.4d}b{20:d}c"},
+    {__LINE__, "a%4.5db%dc", "a{10:4.5d}b{20:d}c"},
+    {__LINE__, "a%db%4.5dc", "a{10:d}b{20:4.5d}c"},
+    {__LINE__, "a%db%*.*dc", "a{10:d}b{40:20.30d}c"},
+    {__LINE__, "a%.*fb", "a{20:.10f}b"},
+    {__LINE__, "a%1$db%2$*3$.*4$dc", "a{10:d}b{20:30.40d}c"},
+    {__LINE__, "a%4$db%3$*2$.*1$dc", "a{40:d}b{30:20.10d}c"},
+    {__LINE__, "a%04ldb", "a{10:04ld}b"},
+    {__LINE__, "a%-#04lldb", "a{10:-#04lld}b"},
+    {__LINE__, "a%1$*5$db", "a{10:-10d}b"},
+    {__LINE__, "a%1$.*5$db", "a{10:d}b"},
+  };
+  for (const Expectation &e : kExpect) {
+    absl::string_view fmt = e.fmt;
+    SCOPED_TRACE(e.line);
+    SCOPED_TRACE(e.fmt);
+    UntypedFormatSpecImpl format(fmt);
+    EXPECT_EQ(e.summary,
+              str_format_internal::Summarize(format, absl::MakeSpan(args)))
+        << "line:" << e.line;
+  }
+}
+
+}  // namespace
+}  // namespace str_format_internal
+}  // inline namespace lts_2018_12_18
+}  // namespace absl