quantopian / zipline / 6021
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llllllllll 
MAINT: make the data loading apis more consistent.

Changes BcolzDailyBarWriter to not be an abc, data is passed as an
iterator of (sid, dataframe) pairs to the write method.

Changes the AssetsDBWriter to be a single class which accepts an engine
at construction time and has a `write` method for writing dataframes for
the various tables. We no longer support writing the various other data
types, callers should coerce their data into a dataframe themselves. See
zipline.assets.synthetic for some helpers to do this.

Adds many new fixtures and updates some existing fixtures to use the new
ones:

WithDefaultDateBounds
  A fixture that provides the suite a START_DATE and END_DATE. This is
  meant to make it easy for other fixtures to synchronize their date
  ranges without depending on eachother in strange ways. For example,
  WithBcolzMinuteBarReader and WithBcolzDailyBarReader by default should
  both have data for the same dates, so they may use depend on
  WithDefaultDates without forcing a dependency between them.

WithTmpDir, WithInstanceTmpDir
  Provides the suite or individual test case a temporary directory.

WithBcolzDailyBarReader
  Provides the suite a BcolzDailyBarReader which reads from bcolz data
  written to a temporary directory. The data will be read from
  dataframes and then converted to bcolz files with
  BcolzDailyBarWriter.write

WithBcolzDailyBarReaderFromCSVs
  Provides the suite a BcolzDailyBarReader which reads from bcolz data
  written to a temporary directory. The data will be read from a
  collection of CSV files and then converted into the bcolz data through
  BcolzDailyBarWriter.write_csvs

WithBcolzMinuteBarReader
  Provides the suite a BcolzMinuteBarReader which reads from bcolz data
  written to a temporary directory. The data will be read from
  dataframes and then converted to bcolz files with
  BcolzMinuteBarWriter.write

WithAdjustmentReader
  Provides the suite a SQLiteAdjustmentReader which reads from an in
  memory sqlite database. The data will be read from dataframes and then
  converted into sqlite with SQLiteAdjustmentWriter.write

WithDataPortal
  Provides each test case a DataPortal object with data from temporary
  resources.

9801 of 11661 relevant lines covered (84.05%)

1.68 hits per line

Jobs
ID Job ID Ran Files Coverage
1 6021.1 (PANDAS_VERSION=0.16.1 NUMPY_VERSION=1.9.2 SCIPY_VERSION=0.15.1) 0
84.02
 Travis Job 6021.1
2 6021.2 (PANDAS_VERSION=0.17.1 NUMPY_VERSION=1.10.4 SCIPY_VERSION=0.16.1) 0
84.02
 Travis Job 6021.2
Source Files on build 6021
Detailed source file information is not available for this build.