add api test with one config

tests/main/test_api.py

@@ -0,0 +1,24 @@
+# Test the zigzag api call
+import pytest
+
+from zigzag.api import get_hardware_performance_zigzag
+
+
+@pytest.fixture
+def workload():
+    return "zigzag/inputs/examples/workload/mobilenetv2.onnx"
+
+
+@pytest.fixture
+def mapping():
+    return "zigzag.inputs.examples.mapping.tpu_like"
+
+
+@pytest.fixture
+def accelerator():
+    return "zigzag.inputs.examples.hardware.TPU_like"
+
+
+def test_api(workload, mapping, accelerator):
+    answer = get_hardware_performance_zigzag(workload, accelerator, mapping)
+    assert answer