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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Artifact 716bc6fafd625ce60dfa62ae128971628c1a1169:


# 2011 April 13
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for the session module. 
# Specifically, for the sqlite3changeset_concat() command.
# 

if {![info exists testdir]} {
  set testdir [file join [file dirname [info script]] .. .. test]
} 
source [file join [file dirname [info script]] session_common.tcl]
source $testdir/tester.tcl
ifcapable !session {finish_test; return}

set testprefix session5

# Organization of tests:
#
#   session5-1.*: Simple tests to check the concat() function produces 
#                 correct results.
#
#   session5-2.*: More complicated tests.
#   
#   session5-3.*: Schema mismatch errors.
#
#   session5-4.*: Test the concat cases that indicate that the database
#                 was modified in between recording of the two changesets
#                 being concatenated (i.e. two changesets that INSERT rows
#                 with the same PK values).
#

proc do_concat_test {tn args} {

  set subtest 0
  foreach sql $args {
    incr subtest
    sqlite3session S db main ; S attach *
    execsql $sql

    set c [S changeset]
    if {[info commands s_prev] != ""} {
      set c_concat [sqlite3changeset_concat $c_prev $c]
      set c_two [s_prev changeset]
      s_prev delete

      set h_concat [changeset_to_list $c_concat]
      set h_two [changeset_to_list $c_two]

      do_test $tn.$subtest [list set {} $h_concat] $h_two
    }
    set c_prev $c
    rename S s_prev
  }

  catch { s_prev delete }
}

#-------------------------------------------------------------------------
# Test cases session5-1.* - simple tests.
#
do_execsql_test 1.0 {
  CREATE TABLE t1(a PRIMARY KEY, b);
}

do_concat_test 1.1.1 {
  INSERT INTO t1 VALUES(1, 'one');
} {
  INSERT INTO t1 VALUES(2, 'two');
}

do_concat_test 1.1.2 {
  UPDATE t1 SET b = 'five' WHERE a = 1;
} {
  UPDATE t1 SET b = 'six' WHERE a = 2;
}

do_concat_test 1.1.3 {
  DELETE FROM t1 WHERE a = 1;
} {
  DELETE FROM t1 WHERE a = 2;
}


# 1.2.1:    INSERT + DELETE                     -> (none)
# 1.2.2:    INSERT + UPDATE                     -> INSERT
#
# 1.2.3:    DELETE + INSERT (matching data)     -> (none)
# 1.2.4:    DELETE + INSERT (non-matching data) -> UPDATE
#
# 1.2.5:    UPDATE + UPDATE (matching data)     -> (none)
# 1.2.6:    UPDATE + UPDATE (non-matching data) -> UPDATE
# 1.2.7:    UPDATE + DELETE                     -> DELETE
#
do_concat_test 1.2.1 {
  INSERT INTO t1 VALUES('x', 'y');
} {
  DELETE FROM t1 WHERE a = 'x';
}
do_concat_test 1.2.2 {
  INSERT INTO t1 VALUES(5.0, 'five');
} {
  UPDATE t1 SET b = 'six' WHERE a = 5.0;
}

do_execsql_test 1.2.3.1 "INSERT INTO t1 VALUES('I', 'one')"
do_concat_test 1.2.3.2 {
  DELETE FROM t1 WHERE a = 'I';
} {
  INSERT INTO t1 VALUES('I', 'one');
}
do_concat_test 1.2.4 {
  DELETE FROM t1 WHERE a = 'I';
} {
  INSERT INTO t1 VALUES('I', 'two');
}
do_concat_test 1.2.5 {
  UPDATE t1 SET b = 'five' WHERE a = 'I';
} {
  UPDATE t1 SET b = 'two' WHERE a = 'I';
}
do_concat_test 1.2.6 {
  UPDATE t1 SET b = 'six' WHERE a = 'I';
} {
  UPDATE t1 SET b = 'seven' WHERE a = 'I';
}
do_concat_test 1.2.7 {
  UPDATE t1 SET b = 'eight' WHERE a = 'I';
} {
  DELETE FROM t1 WHERE a = 'I';
}


#-------------------------------------------------------------------------
# Test cases session5-2.* - more complex tests.
#
db function indirect indirect 
proc indirect {{x -1}} {
  S indirect $x
  s_prev indirect $x
}
do_concat_test 2.1 {
  CREATE TABLE abc(a, b, c PRIMARY KEY);
  INSERT INTO abc VALUES(NULL, NULL, 1);
  INSERT INTO abc VALUES('abcdefghijkl', NULL, 2);
} {
  DELETE FROM abc WHERE c = 1;
  UPDATE abc SET c = 1 WHERE c = 2;
} {
  INSERT INTO abc VALUES('abcdefghijkl', NULL, 2);
  INSERT INTO abc VALUES(1.0, 2.0, 3);
} {
  UPDATE abc SET a = a-1;
} {
  CREATE TABLE def(d, e, f, PRIMARY KEY(e, f));
  INSERT INTO def VALUES('x', randomblob(11000), 67);
  INSERT INTO def SELECT d, e, f+1 FROM def;
  INSERT INTO def SELECT d, e, f+2 FROM def;
  INSERT INTO def SELECT d, e, f+4 FROM def;
} {
  DELETE FROM def WHERE rowid>4;
} { 
  INSERT INTO def SELECT d, e, f+4 FROM def; 
} {
  INSERT INTO abc VALUES(22, 44, -1);
} { 
  UPDATE abc SET c=-2 WHERE c=-1;
  UPDATE abc SET c=-3 WHERE c=-2;
} {
  UPDATE abc SET c=-4 WHERE c=-3;
} {
  UPDATE abc SET a=a+1 WHERE c=-3;
  UPDATE abc SET a=a+1 WHERE c=-3;
} {
  UPDATE abc SET a=a+1 WHERE c=-3;
  UPDATE abc SET a=a+1 WHERE c=-3;
} {
  INSERT INTO abc VALUES('one', 'two', 'three');
} {
  SELECT indirect(1);
  UPDATE abc SET a='one point five' WHERE c = 'three';
} {
  SELECT indirect(0);
  UPDATE abc SET a='one point six' WHERE c = 'three';
} {
  CREATE TABLE x1(a, b, PRIMARY KEY(a));
  SELECT indirect(1);
  INSERT INTO x1 VALUES(1, 2);
} {
  SELECT indirect(1);
  UPDATE x1 SET b = 3 WHERE a = 1;
}

catch {db close}
forcedelete test.db
sqlite3 db test.db
do_concat_test 2.2 {
  CREATE TABLE t1(a, b, PRIMARY KEY(b));
  CREATE TABLE t2(a PRIMARY KEY, b);
  INSERT INTO t1 VALUES('string', 1);
  INSERT INTO t1 VALUES(4, 2);
  INSERT INTO t1 VALUES(X'FFAAFFAAFFAA', 3);
} {
  INSERT INTO t2 VALUES('one', 'two');
  INSERT INTO t2 VALUES(1, NULL);
  UPDATE t1 SET a = 5 WHERE a = 2;
} {
  DELETE FROM t2 WHERE a = 1;
  UPDATE t1 SET a = 4 WHERE a = 2;
  INSERT INTO t2 VALUES('x', 'y');
}

do_test 2.3.0 {
  catch {db close}
  forcedelete test.db
  sqlite3 db test.db
 
  set sql1 ""
  set sql2 ""
  for {set i 1} {$i < 120} {incr i} {
    append sql1 "INSERT INTO x1 VALUES($i*4, $i);"
  }
  for {set i 1} {$i < 120} {incr i} {
    append sql2 "DELETE FROM x1 WHERE a = $i*4;"
  }
  set {} {}
} {}
do_concat_test 2.3 {
  CREATE TABLE x1(a PRIMARY KEY, b)
} $sql1 $sql2 $sql1 $sql2

do_concat_test 2.4 {
  CREATE TABLE x2(a PRIMARY KEY, b);
  CREATE TABLE x3(a PRIMARY KEY, b);

  INSERT INTO x2 VALUES('a', 'b');
  INSERT INTO x2 VALUES('x', 'y');
  INSERT INTO x3 VALUES('a', 'b');
} {
  INSERT INTO x2 VALUES('c', 'd');
  INSERT INTO x3 VALUES('e', 'f');
  INSERT INTO x3 VALUES('x', 'y');
}

do_concat_test 2.5 {
  UPDATE x3 SET b = 'Y' WHERE a = 'x'
} {
  DELETE FROM x3 WHERE a = 'x'
} {
  DELETE FROM x2 WHERE a = 'a'
} {
  INSERT INTO x2 VALUES('a', 'B');
}

for {set k 1} {$k <=10} {incr k} {
  do_test 2.6.$k.1 {
    drop_all_tables
    set sql1 ""
    set sql2 ""
    for {set i 1} {$i < 120} {incr i} {
      append sql1 "INSERT INTO x1 VALUES(randomblob(20+(random()%10)), $i);"
    }
    for {set i 1} {$i < 120} {incr i} {
      append sql2 "DELETE FROM x1 WHERE rowid = $i;"
    }
    set {} {}
  } {}
  do_concat_test 2.6.$k {
    CREATE TABLE x1(a PRIMARY KEY, b)
  } $sql1 $sql2 $sql1 $sql2
}

for {set k 1} {$k <=10} {incr k} {
  do_test 2.7.$k.1 {
    drop_all_tables
    set sql1 ""
    set sql2 ""
    for {set i 1} {$i < 120} {incr i} {
      append sql1 {
        INSERT INTO x1 VALUES(
         CASE WHEN random()%2 THEN random() ELSE randomblob(20+random()%10) END,
         CASE WHEN random()%2 THEN random() ELSE randomblob(20+random()%10) END
        );
      }
    }
    for {set i 1} {$i < 120} {incr i} {
      append sql2 "DELETE FROM x1 WHERE rowid = $i;"
    }
    set {} {}
  } {}
  do_concat_test 2.7.$k {
    CREATE TABLE x1(a PRIMARY KEY, b)
  } $sql1 $sql2 $sql1 $sql2
}


#-------------------------------------------------------------------------
# Test that schema incompatibilities are detected correctly.
#
#   session5-3.1: Incompatible number of columns.
#   session5-3.2: Incompatible PK definition.
#

do_test 3.1 {
  db close
  forcedelete test.db
  sqlite3 db test.db

  execsql { CREATE TABLE t1(a PRIMARY KEY, b) }
  set c1 [changeset_from_sql { INSERT INTO t1 VALUES(1, 2) }]
  execsql { 
    DROP TABLE t1;
    CREATE TABLE t1(a PRIMARY KEY, b, c);
  }
  set c2 [changeset_from_sql { INSERT INTO t1 VALUES(2, 3, 4) }]

  list [catch { sqlite3changeset_concat $c1 $c2 } msg] $msg
} {1 SQLITE_SCHEMA}

do_test 3.2 {
  db close
  forcedelete test.db
  sqlite3 db test.db

  execsql { CREATE TABLE t1(a PRIMARY KEY, b) }
  set c1 [changeset_from_sql { INSERT INTO t1 VALUES(1, 2) }]
  execsql { 
    DROP TABLE t1;
    CREATE TABLE t1(a, b PRIMARY KEY);
  }
  set c2 [changeset_from_sql { INSERT INTO t1 VALUES(2, 3) }]

  list [catch { sqlite3changeset_concat $c1 $c2 } msg] $msg
} {1 SQLITE_SCHEMA}

#-------------------------------------------------------------------------
# Test that concat() handles these properly:
#
#   session5-4.1: INSERT + INSERT
#   session5-4.2: UPDATE + INSERT
#   session5-4.3: DELETE + UPDATE
#   session5-4.4: DELETE + DELETE
#

proc do_concat_test2 {tn sql1 sqlX sql2 expected} {
  sqlite3session S db main ; S attach *
  execsql $sql1
  set ::c1 [S changeset]
  S delete

  execsql $sqlX

  sqlite3session S db main ; S attach *
  execsql $sql2
  set ::c2 [S changeset]
  S delete

  uplevel do_test $tn [list {
    changeset_to_list [sqlite3changeset_concat $::c1 $::c2]
  }] [list [normalize_list $expected]]
}

drop_all_tables db
do_concat_test2 4.1 {
  CREATE TABLE t1(a PRIMARY KEY, b);
  INSERT INTO t1 VALUES('key', 'value');
} {
  DELETE FROM t1 WHERE a = 'key';
} {
  INSERT INTO t1 VALUES('key', 'xxx');
} {
  {INSERT t1 0 X. {} {t key t value}}
}
do_concat_test2 4.2 {
  UPDATE t1 SET b = 'yyy';
} {
  DELETE FROM t1 WHERE a = 'key';
} {
  INSERT INTO t1 VALUES('key', 'value');
} {
  {UPDATE t1 0 X. {t key t xxx} {{} {} t yyy}}
}
do_concat_test2 4.3 {
  DELETE FROM t1 WHERE a = 'key';
} {
  INSERT INTO t1 VALUES('key', 'www');
} {
  UPDATE t1 SET b = 'valueX' WHERE a = 'key';
} {
  {DELETE t1 0 X. {t key t value} {}}
}
do_concat_test2 4.4 {
  DELETE FROM t1 WHERE a = 'key';
} {
  INSERT INTO t1 VALUES('key', 'ttt');
} {
  DELETE FROM t1 WHERE a = 'key';
} {
  {DELETE t1 0 X. {t key t valueX} {}}
}

finish_test