enable json1 extension (#440)

Author: kaizhu256

Makefile

@@ -23,6 +23,7 @@ CFLAGS = \
 	-DSQLITE_DISABLE_LFS \
 	-DSQLITE_ENABLE_FTS3 \
 	-DSQLITE_ENABLE_FTS3_PARENTHESIS \
+	-DSQLITE_ENABLE_JSON1 \
 	-DSQLITE_THREADSAFE=0 \
 	-DSQLITE_ENABLE_NORMALIZE
 

README.md

@@ -300,7 +300,7 @@ For each [release](https://github.com/sql-js/sql.js/releases/), you will find a
 - Install the EMSDK, [as described here](https://emscripten.org/docs/getting_started/downloads.html)
 - Run `npm run rebuild`
 
-In order to enable extensions like JSON1 or FTS5, change the CFLAGS in the [Makefile](Makefile) and rebuild:
+In order to enable extensions like FTS5, change the CFLAGS in the [Makefile](Makefile) and rebuild:
 
 ``` diff
 CFLAGS = \
@@ -310,6 +310,6 @@ CFLAGS = \
         -DSQLITE_ENABLE_FTS3 \
         -DSQLITE_ENABLE_FTS3_PARENTHESIS \
 +       -DSQLITE_ENABLE_FTS5 \
-+       -DSQLITE_ENABLE_JSON1 \
+        -DSQLITE_ENABLE_JSON1 \
         -DSQLITE_THREADSAFE=0
 ```

test/test_json1.js

@@ -0,0 +1,109 @@
+exports.test = function(sql, assert) {
+  var db = new sql.Database();
+  // tests taken from https://www.sqlite.org/json1.html#jmini
+  [
+    // The json() function
+    `json(' { "this" : "is", "a": [ "test" ] } ') = '{"this":"is","a":["test"]}'`,
+
+    // The json_array_length() function
+    `json_array(1,2,'3',4) = '[1,2,"3",4]'`,
+    `json_array('[1,2]') = '["[1,2]"]'`,
+    `json_array(json_array(1,2)) = '[[1,2]]'`,
+    `json_array(1,null,'3','[4,5]','{"six":7.7}') = '[1,null,"3","[4,5]","{\\"six\\":7.7}"]'`,
+    `json_array(1,null,'3',json('[4,5]'),json('{"six":7.7}')) = '[1,null,"3",[4,5],{"six":7.7}]'`,
+    `json_array_length('[1,2,3,4]') = 4`,
+    `json_array_length('[1,2,3,4]', '$') = 4`,
+    `json_array_length('[1,2,3,4]', '$[2]') = 0`,
+    `json_array_length('{"one":[1,2,3]}') = 0`,
+    `json_array_length('{"one":[1,2,3]}', '$.one') = 3`,
+    `json_array_length('{"one":[1,2,3]}', '$.two') = null`,
+
+    // The json_extract() function
+    `json_extract('{"a":2,"c":[4,5,{"f":7}]}', '$') = '{"a":2,"c":[4,5,{"f":7}]}'`,
+    `json_extract('{"a":2,"c":[4,5,{"f":7}]}', '$.c') = '[4,5,{"f":7}]'`,
+    `json_extract('{"a":2,"c":[4,5,{"f":7}]}', '$.c[2]') = '{"f":7}'`,
+    `json_extract('{"a":2,"c":[4,5,{"f":7}]}', '$.c[2].f') = 7`,
+    `json_extract('{"a":2,"c":[4,5],"f":7}','$.c','$.a') = '[[4,5],2]'`,
+    `json_extract('{"a":2,"c":[4,5],"f":7}','$.c[#-1]') = 5`,
+    `json_extract('{"a":2,"c":[4,5,{"f":7}]}', '$.x') = null`,
+    `json_extract('{"a":2,"c":[4,5,{"f":7}]}', '$.x', '$.a') = '[null,2]'`,
+
+    // The json_insert(), json_replace, and json_set() functions
+    `json_insert('[1,2,3,4]','$[#]',99) = '[1,2,3,4,99]'`,
+    `json_insert('[1,[2,3],4]','$[1][#]',99) = '[1,[2,3,99],4]'`,
+    `json_insert('{"a":2,"c":4}', '$.a', 99) = '{"a":2,"c":4}'`,
+    `json_insert('{"a":2,"c":4}', '$.e', 99) = '{"a":2,"c":4,"e":99}'`,
+    `json_replace('{"a":2,"c":4}', '$.a', 99) = '{"a":99,"c":4}'`,
+    `json_replace('{"a":2,"c":4}', '$.e', 99) = '{"a":2,"c":4}'`,
+    `json_set('{"a":2,"c":4}', '$.a', 99) = '{"a":99,"c":4}'`,
+    `json_set('{"a":2,"c":4}', '$.e', 99) = '{"a":2,"c":4,"e":99}'`,
+    `json_set('{"a":2,"c":4}', '$.c', '[97,96]') = '{"a":2,"c":"[97,96]"}'`,
+    `json_set('{"a":2,"c":4}', '$.c', json('[97,96]')) = '{"a":2,"c":[97,96]}'`,
+    `json_set('{"a":2,"c":4}', '$.c', json_array(97,96)) = '{"a":2,"c":[97,96]}'`,
+
+    // The json_object() function
+    `json_object('a',2,'c',4) = '{"a":2,"c":4}'`,
+    `json_object('a',2,'c','{e:5}') = '{"a":2,"c":"{e:5}"}'`,
+    `json_object('a',2,'c',json_object('e',5)) = '{"a":2,"c":{"e":5}}'`,
+
+    // The json_patch() function
+    `json_patch('{"a":1,"b":2}','{"c":3,"d":4}') = '{"a":1,"b":2,"c":3,"d":4}'`,
+    `json_patch('{"a":[1,2],"b":2}','{"a":9}') = '{"a":9,"b":2}'`,
+    `json_patch('{"a":[1,2],"b":2}','{"a":null}') = '{"b":2}'`,
+    `json_patch('{"a":1,"b":2}','{"a":9,"b":null,"c":8}') = '{"a":9,"c":8}'`,
+    `json_patch('{"a":{"x":1,"y":2},"b":3}','{"a":{"y":9},"c":8}') = '{"a":{"x":1,"y":9},"b":3,"c":8}'`,
+
+    // The json_remove() function
+    `json_remove('[0,1,2,3,4]','$[2]') = '[0,1,3,4]'`,
+    `json_remove('[0,1,2,3,4]','$[2]','$[0]') = '[1,3,4]'`,
+    `json_remove('[0,1,2,3,4]','$[0]','$[2]') = '[1,2,4]'`,
+    `json_remove('[0,1,2,3,4]','$[#-1]','$[0]') = '[1,2,3]'`,
+    `json_remove('{"x":25,"y":42}') = '{"x":25,"y":42}'`,
+    `json_remove('{"x":25,"y":42}','$.z') = '{"x":25,"y":42}'`,
+    `json_remove('{"x":25,"y":42}','$.y') = '{"x":25}'`,
+    `json_remove('{"x":25,"y":42}','$') = null`,
+
+    // The json_type() function
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}') = 'object'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$') = 'object'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a') = 'array'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[0]') = 'integer'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[1]') = 'real'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[2]') = 'true'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[3]') = 'false'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[4]') = 'null'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[5]') = 'text'`,
+    `json_type('{"a":[2,3.5,true,false,null,"x"]}','$.a[6]') = null`,
+
+    // The json_valid() function
+    `json_valid('{"x":35}') = 1`,
+    `json_valid('{"x":35') = 0`,
+
+    // The json_quote() function
+    `json_quote(3.14159) = 3.14159`,
+    `json_quote('verdant') = "verdant"`
+  ].forEach(function (sql) {
+    assert.equal(
+        String(db.exec(
+            "SELECT " + sql.split(" = ")[0] + " AS val;"
+        )[0].values[0][0]),
+        String(sql.split(" = ")[1].replace(/'/g, ""))
+    );
+  });
+};
+
+if (module == require.main) {
+  const target_file = process.argv[2];
+  const sql_loader = require('./load_sql_lib');
+  sql_loader(target_file).then((sql)=>{
+    require('test').run({
+      'test extension functions': function(assert){
+        exports.test(sql, assert);
+      }
+    });
+  })
+  .catch((e)=>{
+    console.error(e);
+    assert.fail(e);
+  });
+}