replace=True and ignore=True parameters for create_view(), closes #106

tests/test_create_view.py

@@ -0,0 +1,43 @@
+import pytest
+from sqlite_utils.utils import OperationalError
+
+
+def test_create_view(fresh_db):
+    fresh_db.create_view("bar", "select 1 + 1")
+    rows = fresh_db.conn.execute("select * from bar").fetchall()
+    assert [(2,)] == rows
+
+
+def test_create_view_error(fresh_db):
+    fresh_db.create_view("bar", "select 1 + 1")
+    with pytest.raises(OperationalError):
+        fresh_db.create_view("bar", "select 1 + 2")
+
+
+def test_create_view_only_arrow_one_param(fresh_db):
+    with pytest.raises(AssertionError):
+        fresh_db.create_view("bar", "select 1 + 2", ignore=True, replace=True)
+
+
+def test_create_view_ignore(fresh_db):
+    fresh_db.create_view("bar", "select 1 + 1").create_view(
+        "bar", "select 1 + 2", ignore=True
+    )
+    rows = fresh_db.conn.execute("select * from bar").fetchall()
+    assert [(2,)] == rows
+
+
+def test_create_view_replace(fresh_db):
+    fresh_db.create_view("bar", "select 1 + 1").create_view(
+        "bar", "select 1 + 2", replace=True
+    )
+    rows = fresh_db.conn.execute("select * from bar").fetchall()
+    assert [(3,)] == rows
+
+
+def test_create_view_replace_with_same_does_nothing(fresh_db):
+    fresh_db.create_view("bar", "select 1 + 1")
+    initial_version = fresh_db.conn.execute("PRAGMA schema_version").fetchone()[0]
+    fresh_db.create_view("bar", "select 1 + 1", replace=True)
+    after_version = fresh_db.conn.execute("PRAGMA schema_version").fetchone()[0]
+    assert after_version == initial_version