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Add tests which demonstrate the difference in behavior for zero-length results in sqlite3_value_text_v2() (empty string) vs sqlite3_value_blob_v2() (NULL).

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FossilOrigin-Name: 2e7cf00d161e151d49113928fd3ef05069ecbe0635eddd844e9220bd015fe6f9
This commit is contained in:
stephan
2025-07-01 09:02:27 +00:00
parent 19bad512e5
commit c4c7d9ac89
3 changed files with 17 additions and 10 deletions
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13
ext/wasm/tester1.c-pp.js
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@ -3345,7 +3345,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
.t("value_text_v2() and friends...", function(sqlite3){
const db = new sqlite3.oo1.DB();
db.exec(["create table t(a,b); insert into t(a,b) ",
"values(1,123),(2,null),(3,'hi world'),(4,X'232A')"]);
"values(1,123),(2,null),(3,'hi world'),(4,X'232A'),(5,'')"]);
const P = wasm.pstack;
const stack = P.pointer;
let q;
@ -3384,6 +3384,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
next(); cmp(null);
next(); cmp('hi world');
next(); cmp( '#*' );
next(); cmp( '' ); // empty strings are not null
/* The following only applies when built with
SQLITE_ENABLE_API_ARMOR: */
T.assert( capi.SQLITE_MISUSE ==
@ -3406,7 +3407,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
.t("value_blob_v2() and friends...", function(sqlite3){
const db = new sqlite3.oo1.DB();
db.exec(["create table t(a,b); insert into t(a,b) ",
"values(1,123),(2,null),(3,'hi'),(4,X'23002A')"]);
"values(1,123),(2,null),(3,'hi'),(4,X'23002A'),(5,'')"]);
const P = wasm.pstack;
const stack = P.pointer;
let q;
@ -3428,7 +3429,10 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
const blob = wasm.peekPtr(ppOut);
const len = wasm.peek32(pnOut);
//log("blob=",wasm.cstrToJs(blob));
T.assert(len === byteList.length, "Lengths don't match");
T.assert(len === byteList.length, "Lengths don't match")
T.assert( len ? !!blob : !blob,
"Expecting len=non-0/blob=non-null or len=0/blob=null. "+
"Got len="+len+" blob=@"+blob );
for( let i = 0; i < len; ++i ){
T.assert( byteList[i] === wasm.peek8(blob+i),
"mismatch at offset "+i+": "+byteList[i]
@ -3439,6 +3443,8 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
next(); cmp([]); // null
next(); cmp([104,105]); // "hi"
next(); cmp([0x23, 0, 0x2a]); // X'23002A'
next(); cmp([]); // empty blobs are null
/* The following only applies when built with
SQLITE_ENABLE_API_ARMOR: */
T.assert( capi.SQLITE_MISUSE ==
@ -3448,6 +3454,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
/* But a 0 pnOut is always okay. */
T.assert( capi.SQLITE_OK ==
capi.sqlite3_value_blob_v2(sv, ppOut, 0) );
}finally{
if( q ) q.finalize();
db.close();