added tests for C library extraction.

Author: Nibba2018

test/fixtures/C.c

@@ -0,0 +1,15 @@
+#include<assert.h>
+#include "complex.h"
+#include <ctype.h>
+#include "stdio.h"
+#include<float.h>
+#include"string.h"
+#include "hey/sup/iomanip.h"
+#include<Hey/ssup/math.h>
+#include"hello/how/stdlib.h"
+#include <great/wchar.h>
+#include"stdbool.h"
+#include<stdint.h>
+#include "hello12"
+#include<WsSup34>
+#include <heyYo3-lol>

test/test_C.py

@@ -0,0 +1,27 @@
+import os
+from language.C import extract_libraries
+
+def test_extract_libraries():
+    dir_path = os.path.dirname(os.path.realpath(__file__))
+    files = ['fixtures/C.c']
+    fq_files = [os.path.join(dir_path, f) for f in files]
+    libs = extract_libraries(fq_files)
+    assert len(libs) == 1
+
+    assert libs['C'] == [
+        "assert.h",
+        "complex.h",
+        "ctype.h",
+        "stdio.h",
+        "float.h",
+        "string.h",
+        "hey/sup/iomanip.h",
+        "Hey/ssup/math.h",
+        "hello/how/stdlib.h",
+        "great/wchar.h",
+        "stdbool.h",
+        "stdint.h",
+        "hello12",
+        "WsSup34",
+        "heyYo3-lol"
+    ]