[build tools] Added test coverage for config features feature

tools/build_api.py

@@ -105,8 +105,26 @@ def get_config(src_path, target, toolchain_name):
     for path in src_paths[1:]:
         resources.add(toolchain.scan_resources(path))
 
+    # Update configuration files until added features creates no changes
+    prev_features = set()
+    while True:
+        # Update the configuration with any .json files found while scanning
         config.add_config_files(resources.json_files)
-    return config.get_config_data()
+
+        # Add features while we find new ones
+        features = config.get_features()
+        if features == prev_features:
+            break
+
+        for feature in features:
+            if feature in resources.features:
+                resources += resources.features[feature]
+
+        prev_features = features
+
+    cfg, macros = config.get_config_data()
+    features = config.get_features()
+    return cfg, macros, features
 
 def build_project(src_path, build_path, target, toolchain_name,
         libraries_paths=None, options=None, linker_script=None,
@@ -207,8 +225,7 @@ def build_project(src_path, build_path, target, toolchain_name,
                 break
 
             for feature in features:
-                if feature not in resources.features:
+                if feature in resources.features:
-                    raise KeyError("Feature %s is unavailable" % feature)
                     resources += resources.features[feature]
 
             prev_features = features
@@ -373,6 +390,7 @@ def build_library(src_paths, build_path, target, toolchain_name,
                 break
 
             for feature in features:
+                if feature in resources.features:
                     resources += resources.features[feature]
 
             prev_features = features

tools/test/config_test/config_test.py

@@ -28,7 +28,7 @@ def compare_config(cfg, expected):
     except KeyError:
         return "Unexpected key '%s' in configuration data" % k
     for k in expected:
-        if k != "desc" and k != "expected_macros" and not k in cfg:
+        if k not in ["desc", "expected_macros", "expected_features"] + cfg.keys():
             return "Expected key '%s' was not found in configuration data" % k
     return ""
 
@@ -43,7 +43,7 @@ def test_tree(full_name, name):
         sys.stdout.flush()
         err_msg = None
         try:
-            cfg, macros = get_config(full_name, target, "GCC_ARM")
+            cfg, macros, features = get_config(full_name, target, "GCC_ARM")
         except ConfigException as e:
             err_msg = e.message
         if err_msg:
@@ -63,13 +63,14 @@ def test_tree(full_name, name):
                 failed += 1
         else:
             res = compare_config(cfg, expected)
+            expected_macros = expected.get("expected_macros", None)
+            expected_features = expected.get("expected_features", None)
+
             if res:
                 print "FAILED!"
                 sys.stdout.write("    " + res + "\n")
                 failed += 1
-            else:
+            elif expected_macros is not None:
-                expected_macros = expected.get("expected_macros", None)
-                if expected_macros is not None:
                 if sorted(expected_macros) != sorted(macros):
                     print "FAILED!"
                     sys.stderr.write("    List of macros doesn't match\n")
@@ -78,6 +79,15 @@ def test_tree(full_name, name):
                     failed += 1
                 else:
                     print "OK"
+            elif expected_features is not None:
+                if sorted(expected_features) != sorted(features):
+                    print "FAILED!"
+                    sys.stderr.write("    List of features doesn't match\n")
+                    sys.stderr.write("    Expected: '%s'\n" % ",".join(sorted(expected_features)))
+                    sys.stderr.write("    Got: '%s'\n" % ",".join(sorted(expected_features)))
+                    failed += 1
+                else:
+                    print "OK"
             else:
                 print "OK"
     sys.path.remove(full_name)

tools/test/config_test/test21/mbed_app.json

@@ -0,0 +1,7 @@
+{
+    "target_overrides": {
+        "*": {
+            "features": ["IPV4", "IPV6"]
+        }
+    }
+}

tools/test/config_test/test21/test_data.py

@@ -0,0 +1,8 @@
+# Testing basic features
+
+expected_results = {
+    "K64F": {
+        "desc": "test basic features",
+        "expected_features": ["IPV4", "IPV6"]
+    }
+}

tools/test/config_test/test22/lib1/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib1",
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV4"]
+        }
+    }
+}

tools/test/config_test/test22/mbed_app.json

@@ -0,0 +1,7 @@
+{
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV6"]
+        }
+    }
+}

tools/test/config_test/test22/test_data.py

@@ -0,0 +1,8 @@
+# Testing when adding two features
+
+expected_results = {
+    "K64F": {
+        "desc": "test composing features",
+        "expected_features": ["IPV4", "IPV6"]
+    }
+}

tools/test/config_test/test23/lib1/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib1",
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV4"]
+        }
+    }
+}

tools/test/config_test/test23/lib2/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib2",
+    "target_overrides": {
+        "*": {
+            "features_remove": ["IPV4"]
+        }
+    }
+}

tools/test/config_test/test23/mbed_app.json

@@ -0,0 +1,7 @@
+{
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV6"]
+        }
+    }
+}

tools/test/config_test/test23/test_data.py

@@ -0,0 +1,8 @@
+# Testing when two features collide
+
+expected_results = {
+    "K64F": {
+        "desc": "test feature collisions",
+        "exception_msg": "Configuration conflict. Feature IPV4 both added and removed." 
+    }
+}

tools/test/config_test/test24/FEATURE_IPV4/lib1/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib1",
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV6"]
+        }
+    }
+}

tools/test/config_test/test24/FEATURE_IPV6/lib2/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib2",
+    "target_overrides": {
+        "*": {
+            "features_add": ["UVISOR"]
+        }
+    }
+}

tools/test/config_test/test24/mbed_app.json

@@ -0,0 +1,7 @@
+{
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV4"]
+        }
+    }
+}

tools/test/config_test/test24/test_data.py

@@ -0,0 +1,8 @@
+# Testing if features can enable other features
+
+expected_results = {
+    "K64F": {
+        "desc": "test recursive features",
+        "expected_features": ["IPV4", "IPV6", "UVISOR"]
+    }
+}

tools/test/config_test/test25/FEATURE_IPV6/FEATURE_IPV4/lib1/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib1",
+    "target_overrides": {
+        "*": {
+            "features_add": ["IPV6"]
+        }
+    }
+}

tools/test/config_test/test25/FEATURE_IPV6/lib2/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib2",
+    "target_overrides": {
+        "*": {
+            "features_add": ["UVISOR"]
+        }
+    }
+}

tools/test/config_test/test25/mbed_app.json

@@ -0,0 +1,7 @@
+{
+    "target_overrides": {
+        "*": {
+            "features": ["IPV4", "IPV6"]
+        }
+    }
+}

tools/test/config_test/test25/test_data.py

@@ -0,0 +1,8 @@
+# Testing if feature collisions are detected accross recursive features
+
+expected_results = {
+    "K64F": {
+        "desc": "test recursive feature collisions",
+        "exception_msg": "Configuration conflict. Feature UVISOR both added and removed." 
+    }
+}