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[#8124] Support regular expressions in MockFileDatabase

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lukaseder 2018-12-17 12:49:12 +01:00
parent 0ed550461e
commit 0568a5a361
1 changed files with 48 additions and 1 deletions
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49
jOOQ-manual/src/main/resources/org/jooq/web/manual-3.12.xml
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@ -14330,7 +14330,7 @@ update t set x = 1;
The above database supports exactly two statements in total, and is completely stateless (e.g. an <code>INSERT</code> statement cannot be made to affect the results of a subsequent <code>SELECT</code> statement on the same table). It can be loaded through the <code>MockFileDatabase</code> can be used as follows:
</p>
</html><java><![CDATA[// Initialise your data provider (implementation further down):
</html><java><![CDATA[// Initialise your data provider:
MockFileDatabase db = new MockFileDatabase(new File("/path/to/db.txt"));
MockConnection connection = new MockConnection(provider);
@ -14347,6 +14347,53 @@ Result<?> result = create.select(inline("C")).fetch();]]></java><html>
<p>
In situations where the expected set of queries are well-defined, the <code>MockFileDatabase</code> can offer a very effective way of mocking parts of the database engine, without offering the complete functionality of the <reference id="mocking-connection" title="programmatic mocking connection"/>.
</p>
<h3>Matching statements using regular expressions</h3>
<p>
Alternatively, regular expressions can be used to match statements in order of definition in the file.
</p>
</html><text><![CDATA[
# Regardless of the number of columns, if selecting 'A' as the first column,
# always return a single row containing columns A and B
select 'A', .*;
> A B
> - -
> A B
@ rows: 1
# All other select statements are assumed to return only a column A
select .*;
> A
> -
> A
@ rows: 1
]]></text><html>
<p>
The same rules apply as before. The first matching statement will be applied for any given input statement.
</p>
<p>
This feature is "opt-in", so it has to be configured appropriately:
</p>
</html><java><![CDATA[// Initialise your data provider:
MockFileDatabase db = new MockFileDatabase(new MockFileDatabaseConfiguration()
.source(new File("/path/to/db.txt"))
.patterns(true) // Turn on regular expressions here
);
MockConnection connection = new MockConnection(provider);
// Pass the mock connection to a jOOQ DSLContext:
DSLContext create = DSL.using(connection, SQLDialect.POSTGRES);
// This returns a column A only
Result<?> result = create.select(inline("X")).fetch();
// This returns columns A and B
Result<?> result = create.select(inline("A"), inline("B"), inline("C")).fetch();]]></java><html>
</html></content>
</section>