test: add test to preserve API compatibility

rusqlite_migration/src/tests/asynch.rs

@@ -118,3 +118,17 @@ async fn test_from_iter() {
     let migrations = AsyncMigrations::from_iter(vec![m_valid0(), m_valid10()]);
     assert_eq!(Ok(()), migrations.validate().await);
 }
+
+#[tokio::test]
+async fn test_tokio_rusqlite_conversion() {
+    use tokio_rusqlite::Error as TError;
+
+    insta::assert_debug_snapshot!(
+        "convert_connection_closed_error",
+        crate::Error::from(TError::ConnectionClosed)
+    );
+    insta::assert_debug_snapshot!(
+        "convert_rusqlite_error",
+        crate::Error::from(TError::Rusqlite(rusqlite::Error::InvalidQuery))
+    );
+}

rusqlite_migration/src/tests/helpers.rs

@@ -80,3 +80,42 @@ pub fn m_invalid_fk() -> M<'static> {
     )
     .foreign_key_check()
 }
+
+pub fn all_errors() -> Vec<crate::Error> {
+    use crate::Error::*;
+    use crate::ForeignKeyCheckError;
+    use crate::MigrationDefinitionError;
+    use crate::SchemaVersion;
+    use crate::SchemaVersionError;
+
+    vec![
+        RusqliteError {
+            query: "SELECT * FROM table42;".to_owned(),
+            err: rusqlite::Error::InvalidQuery,
+        },
+        #[cfg(feature = "async-tokio-rusqlite")]
+        ConnectionClosed,
+        SpecifiedSchemaVersion(SchemaVersionError::TargetVersionOutOfRange {
+            specified: SchemaVersion::NoneSet,
+            highest: SchemaVersion::NoneSet,
+        }),
+        MigrationDefinition(MigrationDefinitionError::NoMigrationsDefined),
+        ForeignKeyCheck(vec![
+            ForeignKeyCheckError {
+                table: "t1".to_owned(),
+                rowid: 1,
+                parent: "t2".to_owned(),
+                fkid: 2,
+            },
+            ForeignKeyCheckError {
+                table: "t3".to_owned(),
+                rowid: 2,
+                parent: "t4".to_owned(),
+                fkid: 3,
+            },
+        ]),
+        Hook("in hook".to_owned()),
+        FileLoad("file causing problem".to_owned()),
+        Unrecognized(Box::new(Hook("unknown".to_owned()))),
+    ]
+}

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__asynch__convert_connection_closed_error.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/asynch.rs
+expression: "crate::Error::from(TError::ConnectionClosed)"
+---
+ConnectionClosed

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__asynch__convert_rusqlite_error.snap

@@ -0,0 +1,8 @@
+---
+source: rusqlite_migration/src/tests/asynch.rs
+expression: "crate::Error::from(TError::Rusqlite(rusqlite::Error::InvalidQuery))"
+---
+RusqliteError {
+    query: "",
+    err: InvalidQuery,
+}

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display-2.snap

@@ -1,5 +1,5 @@
 ---
 source: rusqlite_migration/src/tests/synch.rs
-expression: "Error::Hook(String::new())"
+expression: e
 ---
-rusqlite_migrate error: Hook("")
+rusqlite_migrate error: ConnectionClosed

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display-3.snap

@@ -1,5 +1,5 @@
 ---
 source: rusqlite_migration/src/tests/synch.rs
-expression: "Error::ForeignKeyCheck(vec![ForeignKeyCheckError\n        {\n            table : String :: new(), rowid : 1, parent : String :: new(), fkid\n            : 2,\n        }, ForeignKeyCheckError\n        {\n            table : String :: new(), rowid : 2, parent : String :: new(), fkid\n            : 3,\n        },])"
+expression: e
 ---
-rusqlite_migrate error: ForeignKeyCheck([ForeignKeyCheckError { table: "", rowid: 1, parent: "", fkid: 2 }, ForeignKeyCheckError { table: "", rowid: 2, parent: "", fkid: 3 }])
+rusqlite_migrate error: SpecifiedSchemaVersion(TargetVersionOutOfRange { specified: NoneSet, highest: NoneSet })

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display-5.snap

@@ -1,5 +1,5 @@
 ---
 source: rusqlite_migration/src/tests/synch.rs
-expression: "Error::RusqliteError {\n    query: String::new(),\n    err: rusqlite::Error::InvalidQuery,\n}"
+expression: e
 ---
-rusqlite_migrate error: RusqliteError { query: "", err: InvalidQuery }
+rusqlite_migrate error: ForeignKeyCheck([ForeignKeyCheckError { table: "t1", rowid: 1, parent: "t2", fkid: 2 }, ForeignKeyCheckError { table: "t3", rowid: 2, parent: "t4", fkid: 3 }])

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display-6.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e
+---
+rusqlite_migrate error: Hook("in hook")

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display-7.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e
+---
+rusqlite_migrate error: FileLoad("file causing problem")

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display-8.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e
+---
+rusqlite_migrate error: Unrecognized(Hook("unknown"))

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_display.snap

@@ -1,5 +1,5 @@
 ---
 source: rusqlite_migration/src/tests/synch.rs
-expression: "Error::SpecifiedSchemaVersion(SchemaVersionError::TargetVersionOutOfRange {\n        specified: SchemaVersion::NoneSet,\n        highest: SchemaVersion::NoneSet,\n    })"
+expression: e
 ---
-rusqlite_migrate error: SpecifiedSchemaVersion(TargetVersionOutOfRange { specified: NoneSet, highest: NoneSet })
+rusqlite_migrate error: RusqliteError { query: "SELECT * FROM table42;", err: InvalidQuery }

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-2.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+None

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-3.snap

@@ -0,0 +1,10 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+Some(
+    TargetVersionOutOfRange {
+        specified: NoneSet,
+        highest: NoneSet,
+    },
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-4.snap

@@ -0,0 +1,7 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+Some(
+    NoMigrationsDefined,
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-5.snap

@@ -0,0 +1,12 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+Some(
+    ForeignKeyCheckError {
+        table: "t1",
+        rowid: 1,
+        parent: "t2",
+        fkid: 2,
+    },
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-6.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+None

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-7.snap

@@ -0,0 +1,5 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+None

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source-8.snap

@@ -0,0 +1,9 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+Some(
+    Hook(
+        "unknown",
+    ),
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__error_source.snap

@@ -0,0 +1,7 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+Some(
+    InvalidQuery,
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__read_only_db_all_valid.snap

@@ -0,0 +1,18 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e
+---
+Err(
+    RusqliteError {
+        query: "CREATE TABLE m1(a, b); CREATE TABLE m2(a, b, c);",
+        err: SqliteFailure(
+            Error {
+                code: ReadOnly,
+                extended_code: 8,
+            },
+            Some(
+                "attempt to write a readonly database",
+            ),
+        ),
+    },
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__source.snap

@@ -0,0 +1,7 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e.source()
+---
+Some(
+    InvalidQuery,
+)

rusqlite_migration/src/tests/snapshots/rusqlite_migration__tests__synch__user_version_error.snap

@@ -0,0 +1,18 @@
+---
+source: rusqlite_migration/src/tests/synch.rs
+expression: e
+---
+Err(
+    RusqliteError {
+        query: "PRAGMA user_version = 1; -- Approximate query",
+        err: SqliteFailure(
+            Error {
+                code: ReadOnly,
+                extended_code: 8,
+            },
+            Some(
+                "attempt to write a readonly database",
+            ),
+        ),
+    },
+)

rusqlite_migration/src/tests/synch.rs

@@ -1,6 +1,6 @@
 use std::{iter::FromIterator, num::NonZeroUsize};
 
-use rusqlite::{Connection, Transaction};
+use rusqlite::{Connection, OpenFlags, Transaction};
 
 use crate::{
     tests::helpers::{
@@ -10,7 +10,7 @@ use crate::{
     SchemaVersionError, M,
 };
 
-use super::helpers::{m_invalid0, m_invalid1, m_valid20, m_valid21};
+use super::helpers::{all_errors, m_invalid0, m_invalid1, m_valid20, m_valid21};
 
 #[test]
 fn empty_migrations_test() {
@@ -148,38 +148,19 @@ fn test_migration_definition_error_display() {
 
 #[test]
 fn test_error_display() {
-    insta::assert_display_snapshot!(Error::SpecifiedSchemaVersion(
-        SchemaVersionError::TargetVersionOutOfRange {
-            specified: SchemaVersion::NoneSet,
-            highest: SchemaVersion::NoneSet,
-        }
-    ));
-
-    insta::assert_display_snapshot!(Error::Hook(String::new()));
-
-    insta::assert_display_snapshot!(Error::ForeignKeyCheck(vec![
-        ForeignKeyCheckError {
-            table: String::new(),
-            rowid: 1,
-            parent: String::new(),
-            fkid: 2,
-        },
-        ForeignKeyCheckError {
-            table: String::new(),
-            rowid: 2,
-            parent: String::new(),
-            fkid: 3,
-        },
-    ]));
+    for e in all_errors() {
+        insta::assert_display_snapshot!(e);
+    }
+}
 
-    insta::assert_display_snapshot!(Error::MigrationDefinition(
-        MigrationDefinitionError::NoMigrationsDefined
-    ));
+#[test]
+fn test_error_source() {
+    use std::error::Error;
 
-    insta::assert_display_snapshot!(Error::RusqliteError {
-        query: String::new(),
-        err: rusqlite::Error::InvalidQuery,
-    });
+    for e in all_errors() {
+        // For API stability reasons (if that changes, we must change the major version)
+        insta::assert_debug_snapshot!(e.source());
+    }
 }
 
 #[test]
@@ -371,6 +352,18 @@ fn all_valid_test() {
     insta::assert_debug_snapshot!(migrations)
 }
 
+// When the DB encounters an error, it is surfaced
+#[test]
+fn test_read_only_db_all_valid() {
+    let mut conn = Connection::open_in_memory_with_flags(OpenFlags::SQLITE_OPEN_READ_ONLY).unwrap();
+    let migrations = Migrations::new(all_valid());
+
+    let e = migrations.to_latest(&mut conn);
+
+    assert!(e.is_err());
+    insta::assert_debug_snapshot!(e)
+}
+
 // If we encounter a database with a migration number higher than the number of defined migration,
 // we should return an error, not panic.
 // See https://github.com/cljoly/rusqlite_migration/issues/17
@@ -527,3 +520,13 @@ fn test_from_iter() {
     let migrations = Migrations::from_iter(vec![m_valid0(), m_valid10()]);
     assert_eq!(Ok(()), migrations.validate());
 }
+
+#[test]
+fn test_user_version_error() {
+    // This will cause error because the DB is read only
+    let conn = Connection::open_in_memory_with_flags(OpenFlags::SQLITE_OPEN_READ_ONLY).unwrap();
+    let e = crate::set_user_version(&conn, 1);
+
+    assert!(e.is_err(), "{:?}", e);
+    insta::assert_debug_snapshot!(e)
+}