Added basic tests using hypothesis, closes #180

setup.py

@@ -25,7 +25,7 @@ setup(
     install_requires=["click", "click-default-group", "tabulate"],
     setup_requires=["pytest-runner"],
     extras_require={
-        "test": ["pytest", "black"],
+        "test": ["pytest", "black", "hypothesis"],
         "docs": ["sphinx_rtd_theme", "sphinx-autobuild"],
     },
     entry_points="""

tests/test_hypothesis.py

@@ -0,0 +1,43 @@
+from hypothesis import given
+import hypothesis.strategies as st
+import sqlite_utils
+
+# SQLite integers are -(2^63) to 2^63 - 1
+@given(st.integers(-9223372036854775808, 9223372036854775807))
+def test_roundtrip_integers(integer):
+    db = sqlite_utils.Database(memory=True)
+    row = {
+        "integer": integer,
+    }
+    db["test"].insert(row)
+    assert list(db["test"].rows) == [row]
+
+
+@given(st.text())
+def test_roundtrip_text(text):
+    db = sqlite_utils.Database(memory=True)
+    row = {
+        "text": text,
+    }
+    db["test"].insert(row)
+    assert list(db["test"].rows) == [row]
+
+
+@given(st.binary(max_size=1024 * 1024))
+def test_roundtrip_binary(binary):
+    db = sqlite_utils.Database(memory=True)
+    row = {
+        "binary": binary,
+    }
+    db["test"].insert(row)
+    assert list(db["test"].rows) == [row]
+
+
+@given(st.floats(allow_nan=False))
+def test_roundtrip_floats(floats):
+    db = sqlite_utils.Database(memory=True)
+    row = {
+        "floats": floats,
+    }
+    db["test"].insert(row)
+    assert list(db["test"].rows) == [row]