Added a test for rar_downloader

tests/test_plot/test_dep_downloader.py

@@ -0,0 +1,42 @@
+"""
+Tests for Dependencies Downloader
+
+For debug information use:
+pytest-3 --log-cli-level debug
+"""
+import os
+import coverage
+import yaml
+from importlib import reload
+from . import context
+from kibot.mcpyrate import activate  # noqa: F401
+import kibot.dep_downloader as downloader
+import kibot.out_compress as compress
+
+cov = coverage.Coverage()
+bin_dir = os.path.join('.local', 'share', 'kibot', 'bin')
+DEPS = {'Dependencies': [{'from': 'RAR', 'role': 'mandatory'}]}
+
+
+def test_dep_rar(test_dir, caplog, monkeypatch):
+    """ Check missing rar_downloader """
+    # Create a context to get an output directory
+    ctx = context.TestContext(test_dir, 'bom', 'bom')
+    with monkeypatch.context() as m:
+        # Force the downloader to use the output dir
+        home = os.path.abspath(ctx.output_dir)
+        m.setenv("HOME", home)
+        # Refresh the module with actual dependencies
+        mod = reload(downloader)
+        mod.register_deps('test', yaml.safe_load(compress.__doc__))
+        # Get the RAR dependency
+        dep = mod.used_deps['test:rar']
+        # Download it
+        cov.load()
+        cov.start()
+        res = mod.rar_downloader(dep, 'Linux', 'x86_64')
+        cov.stop()
+        cov.save()
+        # We should get the following name:
+        assert res == os.path.join(home, bin_dir, 'rar')
+        # We executed the file