From e32efaa5a1fdcb8ff24142b66ecd6d29aa5e4f71 Mon Sep 17 00:00:00 2001
From: Nathan Ross <nross.se@gmail.com>
Date: Mon, 15 Feb 2016 18:08:37 -0500
Subject: [PATCH] allow feature-gated integration tests for unimplemented
 functionality

---
 Cargo.toml      |  1 +
 Makefile        |  9 ++++++++-
 README.md       |  5 +++++
 build.rs        |  2 +-
 tests/printf.rs | 12 ++++++++++++
 5 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 0fa2cac40..f35b2cab2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -87,6 +87,7 @@ generic = [
   "yes",
 ]
 default = ["generic", "unix"]
+test_unimplemented = []
 
 [dependencies]
 uucore   = { path="src/uucore" }
diff --git a/Makefile b/Makefile
index 9a580c379..f418606b6 100644
--- a/Makefile
+++ b/Makefile
@@ -177,6 +177,13 @@ TEST_PROGS  := \
 TESTS       := \
 	$(sort $(filter $(UTILS),$(filter-out $(SKIP_UTILS),$(TEST_PROGS))))
 
+TEST_NO_FAIL_FAST :=
+TEST_SPEC_FEATURE := 
+ifneq ($(SPEC),)
+TEST_NO_FAIL_FAST :=--no-fail-fast
+TEST_SPEC_FEATURE := test_unimplemented
+endif
+
 define BUILD_EXE
 build_exe_$(1):
 	${CARGO} build ${CARGOFLAGS} ${PROFILE_CMD} -p $(1)
@@ -184,7 +191,7 @@ endef
 
 define TEST_INTEGRATION
 test_integration_$(1): build_exe_$(1)
-	${CARGO} test ${CARGOFLAGS} --test $(1) --features $(1) --no-default-features
+	${CARGO} test ${CARGOFLAGS} --test $(1) --features "$(1) $(TEST_SPEC_FEATURE)" --no-default-features $(TEST_NO_FAIL_FAST)
 endef
 
 define TEST_BUSYBOX
diff --git a/README.md b/README.md
index 94e1249cc..819ee4f78 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,11 @@ To test only a few of the available utilities:
 make UTILS='UTILITY_1 UTILITY_2' test
 ```
 
+To include tests for unimplemented behavior:
+```
+make UTILS='UTILITY_1 UTILITY_2' SPEC=y test
+```
+
 Run busybox tests
 -----------------
 
diff --git a/build.rs b/build.rs
index 7f1cd301e..29c9a1f21 100644
--- a/build.rs
+++ b/build.rs
@@ -12,7 +12,7 @@ pub fn main() {
         if val == "1" && key.starts_with(feature_prefix) {
             let krate = key[feature_prefix.len()..].to_lowercase();
             match krate.as_ref() {
-                "default" | "unix" | "generic" => continue,
+                "default" | "unix" | "generic" | "test_unimplemented" => continue,
                 _ => {},
             }
             crates.push(krate.to_string());
diff --git a/tests/printf.rs b/tests/printf.rs
index 52370b751..be3fae7fb 100644
--- a/tests/printf.rs
+++ b/tests/printf.rs
@@ -188,6 +188,18 @@ fn sub_num_dec_trunc() {
     expect_stdout(vec!["pi is ~ %g", "3.1415926535"], "pi is ~ 3.141593");
 }
 
+#[cfg_attr(not(feature="test_unimplemented"),ignore)]
+#[test]
+fn sub_num_hex_float_lower() {
+    expect_stdout(vec!["%a", ".875"], "0xep-4");
+}
+
+#[cfg_attr(not(feature="test_unimplemented"),ignore)]
+#[test]
+fn sub_num_hex_float_upper() {
+    expect_stdout(vec!["%A", ".875"], "0XEP-4");
+}
+
 #[test]
 fn sub_minwidth() {
     expect_stdout(vec!["hello %7s", "world"], "hello   world");